Apple MD094LL/A Bedienungsanleitung

 Apple Technician GuideiMac (27-inch, Mid 2010) 2010-09-09

iMac (27-inch, Mid 2010) About This Guide — Updates 10 2010-09-09UpdatesUpdated 9 September 2010Troubleshooting:• Display: several symptoms: Modied

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 100 2010-09-097. Connect external speakers or headphones to audio-out port and play a

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 101 2010-09-09Camera IssuesUnlikely cause: LCD display, power supply, hard drive, opti

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 102 2010-09-09FireWire Device Not RecognizedUnlikely cause: LCD display, power supply,

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 103 2010-09-094. Verify if FireWire device is recognized with a known-good FireWire c

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 104 2010-09-09USB Device Not RecognizedUnlikely cause: LCD display, power supply, hard

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 105 2010-09-093. Verify if a known-good USB keyboard and mouse are recognized.Yes Tes

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 106 2010-09-09Wired Keyboard Does Not Function ProperlyQuick CheckSymptoms Quick Check

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 107 2010-09-094. Open System Preferences > Speech. Verify if the “Speak selected t

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 108 2010-09-09Keyboard: Specic Keys Do Not RespondQuick CheckSymptoms Quick CheckKeyb

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 109 2010-09-09Deep DiveCheck Result Action Code1. Verify if computer recognizes keybo

© 2010 Apple Inc. All rights reserved. Apple Technician GuideBasicsiMac (27-inch, Mid 2010)

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 110 2010-09-09Wireless Input Device Does Not Pair Quick CheckSymptoms Quick CheckWirel

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 111 2010-09-09Deep DiveCheck Result Action Code1. (Apple Wireless Keyboard, Magic Mou

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 112 2010-09-095. Reinstall customer’s batteries in device and try to pair Bluetooth d

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 113 2010-09-09Apple Wireless Mouse/Magic Trackpad Erratic TrackingQuick CheckSymptoms

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 114 2010-09-09Wireless Input Device Loses ConnectionQuick CheckSymptoms Quick CheckWir

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 115 2010-09-092. Make sure device is on. In System Preferences > Bluetooth, select

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 116 2010-09-09Apple Battery Charger Does Not Charge Batteries Quick CheckSymptoms Quic

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 117 2010-09-093. Verify if the charger LED will go green when a known-good set of par

iMac (27-inch, Mid 2010) Symptom Charts — Mechanical 118 2010-09-09MechanicalNoise/Hum/VibrationUnlikely cause: LCD panel, glass panel, enclosure, c

iMac (27-inch, Mid 2010) Symptom Charts — Mechanical 119 2010-09-09Deep DiveCheck Result Action Code1. Verify if any tape, gasket, cable label, or c

iMac (27-inch, Mid 2010) Basics — Overview 12 2010-09-09OverviewIntroducing the iMac (27-inch, Mid 2010) with the latest Intel Core i3, Core i5 and C

iMac (27-inch, Mid 2010) Symptom Charts — Mechanical 120 2010-09-097. Remove fans and rotate blades. Verify if fan blades spin smoothly without inte

iMac (27-inch, Mid 2010) Symptom Charts — Mechanical 121 2010-09-09Fan Failures / Thermal IssuesUnlikely cause: speakersQuick CheckSymptoms Quick Ch

iMac (27-inch, Mid 2010) Symptom Charts — Mechanical 122 2010-09-092. Verify if noise sounds like one or more fans running faster than expected.Yes

iMac (27-inch, Mid 2010) Symptom Charts — Mechanical 123 2010-09-09Physical DamageSymptoms Quick CheckPhysical Damage• Broken glass• Bent stand• B

© 2010 Apple Inc. All rights reserved. Service Source Take ApartiMac (27-inch, Mid 2010)

iMac (27-inch, Mid 2010) Take Apart — General Information 125 2010-09-09General InformationOpening the Unit• The iMac (27-inch, Mid 2010) has a glas

iMac (27-inch, Mid 2010) Take Apart — General Information 126 2010-09-09Required Special Tools for Glass PanelSpecial tools are required to remove, h

iMac (27-inch, Mid 2010) Take Apart — General Information 127 2010-09-09Cleaning & Handling the Glass PanelFollow the cleaning procedures in this

iMac (27-inch, Mid 2010) Take Apart — General Information 128 2010-09-09Handling a Broken Glass PanelThe glass panel is not tempered and will break i

iMac (27-inch, Mid 2010) Take Apart — General Information 129 2010-09-093. Peel protective covering o the front of the glass. Remove and discard an

iMac (27-inch, Mid 2010) Basics — Overview 13 2010-09-09Identifying Features The iMac (27-inch, Late 2010) computer features include:• 27-inch displ

iMac (27-inch, Mid 2010) Take Apart — General Information 130 2010-09-095. Continue applying tape horizontally, thoroughly covering the broken glass

iMac (27-inch, Mid 2010) Take Apart — General Information 131 2010-09-097. Lift the entire glass panel o the housing. 8. Place the broken glass in

iMac (27-inch, Mid 2010) Take Apart — General Information 132 2010-09-099. Using a whisk broom, clean the work surface of tiny glass particles. 10.

iMac (27-inch, Mid 2010) Take Apart — General Information 133 2010-09-09SafetyWarning: HIGH VOLTAGE: The AC/DC power supply PCB remains powered up wh

iMac (27-inch, Mid 2010) Take Apart — General Information 134 2010-09-09Logic Board HandlingIMPORTANT: Always use two hands to support the logic boar

iMac (27-inch, Mid 2010) Take Apart — Access Door 135 2010-09-09First Steps • Shut down the computer• Place the computer on a clean, at surfaceToo

iMac (27-inch, Mid 2010) Take Apart — Access Door 136 2010-09-09Removal1 Raise the stand and loosen 3 captive screws. 2 Remove the access door. Imp

iMac (27-inch, Mid 2010) Take Apart — Memory 137 2010-09-09First Steps Remove• Access doorNote: This computer uses PC3-10600, (1333) DDR3, 204-pin,

iMac (27-inch, Mid 2010) Take Apart — Memory 138 2010-09-09Removal1 Untuck tabs in the memory compartment. 2 Pull tab to eject the installed memory

iMac (27-inch, Mid 2010) Take Apart — Glass Panel 139 2010-09-09First Steps • Shut down unit.• Unplug all cables.• Put on ESD strap.Caution: The

iMac (27-inch, Mid 2010) Basics — Overview 14 2010-09-09Safety PrecautionsWARNING: HIGH VOLTAGE: The AC/DC power supply PCB remains powered up whenev

iMac (27-inch, Mid 2010) Take Apart — Glass Panel 140 2010-09-09RemovalNote: Glass panel is held in place by magnets.Caution: Unlike previous model i

iMac (27-inch, Mid 2010) Take Apart — Glass Panel 141 2010-09-093 Remove suction cups and slide glass into protective microfoam bag.Reassembly1 Rem

iMac (27-inch, Mid 2010) Take Apart — Glass Panel 142 2010-09-093 Set unit in upright position to minimize settling of dust.4 Roll silicone roller

iMac (27-inch, Mid 2010) Take Apart — Glass Panel 143 2010-09-097 Wearing clean gloves, place glass directly onto unit, aligning tabs along the bott

iMac (27-inch, Mid 2010) Take Apart — Camera 144 2010-09-09First Steps Remove• Glass panel Tools• Magnetized Torx T10 screwdriver• Black stick• E

iMac (27-inch, Mid 2010) Take Apart — Camera 145 2010-09-09Removal1 Remove 2 T10 screws:• 922-92392 Lift camera bracket out of rear housing.3 Dis

iMac (27-inch, Mid 2010) Take Apart — Camera 146 2010-09-09Reassembly1 Thermal paste is required between the camera and rear housing. Reuse the ther

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 147 2010-09-09First Steps Remove• Glass panel Caution: Do not press on front surface of LCD panel wh

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 148 2010-09-09Removal1 Remove 8 T10 screws:922-9246Reassembly Note: Do not overtighten LCD screws,

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 149 2010-09-093 Looking down into the computer, on the left side, disconnect the vertical sync cable

iMac (27-inch, Mid 2010) Basics — Overview 15 2010-09-09Serial Number LocationThe iMac (27-inch, Mid 2010) serial number is located on the base of th

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 150 2010-09-094 Pull display forward slightly to disconnect:• #1: backlight power cable at bottom o

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 151 2010-09-096 Gently remove the DisplayPort cable. • Squeeze side metal tabs (#1) to release and

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 152 2010-09-098 Without touching the panel surface, carefully store the LCD panel in an antistatic b

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 153 2010-09-09Handling the Panel 1 Important: Handle LCD panel by the edges only. Use two hands to c

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 154 2010-09-09Reassembly1 The panel is heavy! Lift panel and rest it on the “chin” of the rear housi

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 155 2010-09-094 IIn the following order, connect: • #1: display temp sensor• #2: backlight power5

iMac (27-inch, Mid 2010) Take Apart — LCD Panel 156 2010-09-096 Connect the vertical sync cable to the backlight board.7 Replace 8 panel screws.

iMac (27-inch, Mid 2010) Take Apart — Vertical Sync Cable (Vsync) 157 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Black stickRemov

iMac (27-inch, Mid 2010) Take Apart — LED Temp Sensor Cable 158 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Black stickRemoval1 P

iMac (27-inch, Mid 2010) Take Apart — DisplayPort Cable 159 2010-09-09First Steps Remove• Glass panel • LCD panelToolsNo tools are required for thi

iMac (27-inch, Mid 2010) Basics — Overview 16 2010-09-09New AccessoriesMagic TrackpadThe wireless Magic Trackpad uses Bluetooth® technology to connec

iMac (27-inch, Mid 2010) Take Apart — DisplayPort Cable 160 2010-09-092 Peel back aluminum tape securing DisplayPort cable to panel connector.Replac

iMac (27-inch, Mid 2010) Take Apart — Audio Ports and Cable 161 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Torx T10 screwdriver•

iMac (27-inch, Mid 2010) Take Apart — Audio Ports and Cable 162 2010-09-09Removal1 Disconnect audio cable from logic board and remove 2 T10 screws.•

iMac (27-inch, Mid 2010) Take Apart — AirPort Antenna 163 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Magnetized Torx T8 screwdriv

iMac (27-inch, Mid 2010) Take Apart — AirPort Antenna 164 2010-09-09Removal1 Disconnect antenna cable from AirPort card. WARNING: Be careful not t

iMac (27-inch, Mid 2010) Take Apart — AirPort Card 165 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Magnetized Torx T6 screwdriver•

iMac (27-inch, Mid 2010) Take Apart — AirPort Card 166 2010-09-09Removal1 Remove 1 T6 screw.• 922-85792 Disconnect 2 AirPort antenna cables. Impor

iMac (27-inch, Mid 2010) Take Apart — AirPort Carrier Board 167 2010-09-09First Steps Remove• Glass panel • LCD panel• AirPort cardTools• Magneti

iMac (27-inch, Mid 2010) Take Apart — AirPort Carrier Board 168 2010-09-09Removal1 Remove Kapton tape securing AirPort data cable to carrier board.2

iMac (27-inch, Mid 2010) Take Apart — AirPort Cable 169 2010-09-09First Steps Remove• Glass panel • LCD panel• AirPort carrier boardTools• ESD-wr

iMac (27-inch, Mid 2010) Basics — Overview 17 2010-09-09Pairing the Magic TrackpadTo pair your trackpad:1. Choose Apple () > System Preferences,

iMac (27-inch, Mid 2010) Take Apart — AirPort Cable 170 2010-09-09Removal1 With a black stick, remove Kapton tape (wrapped around carrier board) sec

iMac (27-inch, Mid 2010) Take Apart — Bluetooth Antenna 171 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Magnetized Torx T8 screwdr

iMac (27-inch, Mid 2010) Take Apart — Bluetooth Antenna 172 2010-09-09Removal1 Remove 2 T8 screws on antenna board:• 922-47232 Disconnect Bluetoot

iMac (27-inch, Mid 2010) Take Apart — Bluetooth Board 173 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Magnetized Torx T8 screwdriv

iMac (27-inch, Mid 2010) Take Apart — Bluetooth Board 174 2010-09-09Removal1 Disconnect 2 cables:• Bluetooth antenna• Bluetooth data cable2 Remov

iMac (27-inch, Mid 2010) Take Apart — LED Backlight Board 175 2010-09-09First Steps Remove• Glass panel • LCD panelWarning: HIGH VOLTAGEUse extreme

iMac (27-inch, Mid 2010) Take Apart — LED Backlight Board 176 2010-09-09RemovalWarning: HIGH VOLTAGE If the computer is shut down by removing the pow

iMac (27-inch, Mid 2010) Take Apart — Power Supply 177 2010-09-09First Steps Remove• Glass panel • LCD panelWARNING: HIGH VOLTAGEUse extreme cautio

iMac (27-inch, Mid 2010) Take Apart — Power Supply 178 2010-09-09RemovalWARNING: HIGH VOLTAGEIf the computer is shut down by removing the power cord,

iMac (27-inch, Mid 2010) Take Apart — Power Supply 179 2010-09-092 Disconnect 2 cables:• DC power (top cable) • AC power inlet (taped to pressure

iMac (27-inch, Mid 2010) Basics — Overview 18 2010-09-09Apple Battery ChargerUse the Apple Battery Charger to charge rechargeable NiMH batteries for

iMac (27-inch, Mid 2010) Take Apart — Backlight Pressure Wall 180 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supplyTools• ESD m

iMac (27-inch, Mid 2010) Take Apart — Backlight Pressure Wall 181 2010-09-09Removal1 Lift pressure wall o posts in the rear housing.

iMac (27-inch, Mid 2010) Take Apart — Power Supply/Hard drive Pressure Wall 182 2010-09-09First Steps Remove• Glass panel • LCD panel• Power suppl

iMac (27-inch, Mid 2010) Take Apart — Power Supply/Hard drive Pressure Wall 183 2010-09-09RemovalLift pressure wall o posts in the rear housing.Reas

iMac (27-inch, Mid 2010) Take Apart — Power Supply/Hard drive Pressure Wall 184 2010-09-093 Connect AC inlet cable and then press cable into notches

iMac (27-inch, Mid 2010) Take Apart — Hard Drive 185 2010-09-09First Steps Remove• Glass panel • LCD panelTools• Magnetized Torx T10 screwdriver•

iMac (27-inch, Mid 2010) Take Apart — Hard Drive 186 2010-09-09Removal1 Remove 2 T10 screws from mounting bracket:• 922-68502 Disconnect 2 cables

iMac (27-inch, Mid 2010) Take Apart — Hard Drive 187 2010-09-09Reassembly1 If installing a replacement hard drive, transfer the following:• hard dr

iMac (27-inch, Mid 2010) Take Apart — Hard Drive Sensor Cable 188 2010-09-09First Steps Remove• Glass panel • LCD panel• Hard driveNote: Each hard

iMac (27-inch, Mid 2010) Take Apart — Hard Drive Sensor Cable 189 2010-09-09Removal1 Disconnect hard drive sensor cable from hard drive and logic bo

© 2010 Apple Inc. All rights reserved. Apple Technician Guide TroubleshootingiMac (27-inch, Mid 2010)

iMac (27-inch, Mid 2010) Take Apart — Optical Drive 190 2010-09-09First Steps Remove• Glass panel • LCD panelImportant: When servicing the optical

iMac (27-inch, Mid 2010) Take Apart — Optical Drive 191 2010-09-09Removal1 Remove 4 T10 screws.• 922-6850 2 Lift optical drive slightly and wiggle

iMac (27-inch, Mid 2010) Take Apart — Optical Drive 192 2010-09-094 Disconnect optical sensor cable from connector on logic board.

iMac (27-inch, Mid 2010) Take Apart — Optical Drive 193 2010-09-09Reassembly1 If installing a replacement optical drive, a temp sensor/cable is incl

iMac (27-inch, Mid 2010) Take Apart — Optical Drive 194 2010-09-093 Replace screws in order shown. Note: Insert a disc into the optical drive to che

iMac (27-inch, Mid 2010) Take Apart — Optical Sensor Cable 195 2010-09-09First Steps Remove• Glass panel • LCD panel• Optical driveImportant: When

iMac (27-inch, Mid 2010) Take Apart — Optical Sensor Cable 196 2010-09-09Removal1 Disconnect optical sensor cable from logic board.2 Peel up foam g

iMac (27-inch, Mid 2010) Take Apart — Optical Drive Fan 197 2010-09-09First Steps Remove• Glass panel • LCD panel• Optical driveTools• Torx T10 s

iMac (27-inch, Mid 2010) Take Apart — Optical Drive Fan 198 2010-09-09Removal1 Remove 1 T10 screw.• 922-9236 2 Disconnect fan cable from logic boa

iMac (27-inch, Mid 2010) Take Apart — SD Card Reader 199 2010-09-09First Steps Remove• Glass panel • LCD panelImportant: The SD card reader must be

 Apple Inc. © 2010 Apple Inc. All rights reserved.Under the copyright laws, this document may not be copied, in whole or in part, without the written

iMac (27-inch, Mid 2010) — General Troubleshooting 202010-09-09General TroubleshootingWireless TroubleshootingIf you’re having issues with Bluetooth

iMac (27-inch, Mid 2010) Take Apart — SD Card Reader 200 2010-09-09Removal1 Remove 1 T8 screw:• 922-92412 Disconnect cable and with a black stick,

iMac (27-inch, Mid 2010) Take Apart — SD Card Reader 201 2010-09-09ReassemblyThe SD card reader must be replaced like-for-like, with an SD card reade

iMac (27-inch, Mid 2010) Take Apart — SD Card Reader Cable 202 2010-09-09First Steps Remove• Glass panel • LCD panel• Optical drive• Optical driv

iMac (27-inch, Mid 2010) Take Apart — SD Card Reader Cable 203 2010-09-091 Peel back aluminum tape that covers the exposed portion of the SD cable.2

iMac (27-inch, Mid 2010) Take Apart — IR Board and Cable 204 2010-09-09First Steps Remove• Glass panel • LCD panelNote: A new IR board includes a n

iMac (27-inch, Mid 2010) Take Apart — IR Board and Cable 205 2010-09-09Removal1 Remove Kapton tape to access IR cable connector.2 Disconnect IR cab

iMac (27-inch, Mid 2010) Take Apart — Logic Board 206 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure wal

iMac (27-inch, Mid 2010) Take Apart — Logic Board 207 2010-09-09Removal1 Carefully disconnect 14 cables from the logic board. (1) power button(2) CP

iMac (27-inch, Mid 2010) Take Apart — Logic Board 208 2010-09-093 Remove 8 T10 screws, (in graphic: S=short, M=medium, L=long)• 922-6800, (2) short

iMac (27-inch, Mid 2010) Take Apart — Logic Board 209 2010-09-095 Carefully lift board up and out of rear housing.Handling the Logic BoardImportant:

iMac (27-inch, Mid 2010) — General Troubleshooting 212010-09-09Hardware vs. SoftwareFor information on how to isolate a hardware issue from a softwar

iMac (27-inch, Mid 2010) Take Apart — Logic Board 210 2010-09-09Reassembly1 Remove HD temp sensor jumper if present (applies to SSD-only congs).Imp

iMac (27-inch, Mid 2010) Take Apart — Logic Board 211 2010-09-093 Transfer: • memory (install after logic board is in place)• video card• optical

iMac (27-inch, Mid 2010) Take Apart — Logic Board 212 2010-09-097 Lower board into rear housing. Connect 2-3 cables on the back side, depending on t

iMac (27-inch, Mid 2010) Take Apart — Logic Board 213 2010-09-098 Check that the video card cable is connected to the back side of the board9 Obser

iMac (27-inch, Mid 2010) Take Apart — Logic Board 214 2010-09-0910 As you the lower board, position cables into lowest notch on pressure wall.Note: L

iMac (27-inch, Mid 2010) Take Apart — Logic Board 215 2010-09-0912 Insert cable connectors into the I/O ports to align the board to the ports before

iMac (27-inch, Mid 2010) Take Apart — Video Card 216 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure wall

iMac (27-inch, Mid 2010) Take Apart — Video Card 217 2010-09-09Removal1 Remove 3 screws attaching video card to bracket.• (1) 922-7971, T10 • (2)

iMac (27-inch, Mid 2010) Take Apart — Video Card 218 2010-09-091 To remove the bracket, remove 3 T8 screws on front side of logic board.• 922-47232

iMac (27-inch, Mid 2010) Take Apart — Solid State Drive (SSD) 219 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight

iMac (27-inch, Mid 2010) — General Troubleshooting 222010-09-09Resetting the System Management Controller (SMC)The System Management Controller (SMC)

iMac (27-inch, Mid 2010) Take Apart — Solid State Drive (SSD) 220 2010-09-09Removal1 Note: There are two SSD drive congs:• HDD + SSD or,• SSD-on

iMac (27-inch, Mid 2010) Take Apart — Solid State Drive (SSD) 221 2010-09-094 Use a black stick to pry pressure wall o rear housing. Dotted lines

iMac (27-inch, Mid 2010) Take Apart — Solid State Drive (SSD) 222 2010-09-09Reassembly 1 Make sure the Bluetooth cable routes over the top of the S

iMac (27-inch, Mid 2010) Take Apart — SSD Data Cable 223 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure

iMac (27-inch, Mid 2010) Take Apart — SSD Data Cable 224 2010-09-09Removal1 Disconnect SSD data cable from top of SSD drive. Replacement Note: The

iMac (27-inch, Mid 2010) Take Apart — Optical/MXM Pressure Wall 225 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backligh

iMac (27-inch, Mid 2010) Take Apart — Optical/MXM Pressure Wall 226 2010-09-09RemovalNote: Observe the Bluetooth and microphone cable routing before

iMac (27-inch, Mid 2010) Take Apart — Hard Drive Data Cable 227 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pr

iMac (27-inch, Mid 2010) Take Apart — Hard Drive Data Cable 228 2010-09-09Removal1 Disconnect hard drive data cable from side of hard drive.2 Disco

iMac (27-inch, Mid 2010) Take Apart — Hard Drive Data Cable 229 2010-09-09Replacement Note: As you lower logic board, route DC power cable and hard d

iMac (27-inch, Mid 2010) — General Troubleshooting 232010-09-09Starting Up in Safe ModeA Safe Boot is a special way to start Mac OS X when troublesho

iMac (27-inch, Mid 2010) Take Apart — Optical Drive Data Cable 230 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight

iMac (27-inch, Mid 2010) Take Apart — Optical Drive Data Cable 231 2010-09-09RemovalDisconnect optical data cable from back side of logic board.Repla

iMac (27-inch, Mid 2010) Take Apart — Battery 232 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure wall•

iMac (27-inch, Mid 2010) Take Apart — Battery 233 2010-09-09Removal1 Use a black stick to pry battery from battery socket on back side of logic boar

iMac (27-inch, Mid 2010) Take Apart — Right Speaker 234 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure w

iMac (27-inch, Mid 2010) Take Apart — Right Speaker 235 2010-09-09Removal1 Remove 1 T10 screw.• 922-9242 2 Rotate speaker to the left and lift out

iMac (27-inch, Mid 2010) Take Apart — CPU Fan 236 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure wall•

iMac (27-inch, Mid 2010) Take Apart — CPU Fan 237 2010-09-09Removal1 Remove 2 T10 shoulder screws.• 922-92362 Lift fan up and out of rear housing.

iMac (27-inch, Mid 2010) Take Apart — CPU Fan 238 2010-09-09Reassembly1 Route sensor cable through clip on fan.2 Route ambient sensor cable under f

iMac (27-inch, Mid 2010) Take Apart — Ambient Temp Sensor 239 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pres

iMac (27-inch, Mid 2010) — General Troubleshooting 242010-09-09Removing the Battery, Measuring DC Voltage1. Unplug the computer. Allow several minut

iMac (27-inch, Mid 2010) Take Apart — Ambient Temp Sensor 240 2010-09-09Removal1 Note routing of temp sensor cable through clips on fan.2 Release s

iMac (27-inch, Mid 2010) Take Apart — Left Speaker 241 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure wa

iMac (27-inch, Mid 2010) Take Apart — Left Speaker 242 2010-09-09Removal1 Remove 1 T10 screw.• 922-8249 2 Lift speaker out of rear shousing.Reass

iMac (27-inch, Mid 2010) Take Apart — Left Speaker 243 2010-09-092 Route speaker cable above AC power inlet and toward right speaker. Tuck speaker c

iMac (27-inch, Mid 2010) Take Apart — Hard Drive Fan 244 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure

iMac (27-inch, Mid 2010) Take Apart — Hard Drive Fan 245 2010-09-09Removal 1 Remove 1 T10 screw.• 922-9236 2 Pull the fan straight up and o the g

iMac (27-inch, Mid 2010) Take Apart — Mechanism Cover 246 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure

iMac (27-inch, Mid 2010) Take Apart — Mechanism Cover 247 2010-09-09Removal1 Peel up aluminum tape.2 Remove 4 T10 screws; two at the top (bigger sc

iMac (27-inch, Mid 2010) Take Apart — Stand 248 2010-09-09First Steps No preliminary steps are required to remove the stand.Tools• Torx T10 screwdri

iMac (27-inch, Mid 2010) Take Apart — Stand 249 2010-09-09Removal1 Place the computer face down on a table so that the base of the stand extends ove

iMac (27-inch, Mid 2010) — General Troubleshooting 252010-09-09DiagnosticsThe following diagnostics are required for this product:• Apple Service Di

iMac (27-inch, Mid 2010) Take Apart — Stand 250 2010-09-095 Remove 8 T10 screws.• 922-8174 6 Separate the stand from the clutch mechanism.Reassemb

iMac (27-inch, Mid 2010) Take Apart — Stand 251 2010-09-094 Insert the access card as far as it will go. Gently lift the stand approximately two in

iMac (27-inch, Mid 2010) Take Apart — Mechanism 252 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure wall•

iMac (27-inch, Mid 2010) Take Apart — Mechanism 253 2010-09-09Removal1 Remove 6 T10 screws:• 922-9238 2 Lift mechanism o rear housing.

iMac (27-inch, Mid 2010) Take Apart — Bluetooth Cable 254 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply• Backlight pressure

iMac (27-inch, Mid 2010) Take Apart — Bluetooth Cable 255 2010-09-09Removal1 Disconnect the black Bluetooth cable from Bluetooth board 2 Follow cab

iMac (27-inch, Mid 2010) Take Apart — Bluetooth Cable 256 2010-09-093 Peel back EMI tape securing Bluetooth cable to rear housing Lift cable from re

iMac (27-inch, Mid 2010) Take Apart — Camera Cable 257 2010-09-09First Steps Remove• Glass panel • LCD panel• Camera• Hard drive• Power supply•

iMac (27-inch, Mid 2010) Take Apart — Camera Cable 258 2010-09-09Removal1 Disconnect camera cable from camera board at top of rear housing.2 Discon

iMac (27-inch, Mid 2010) Take Apart — Camera Cable 259 2010-09-093 Remove EMI tape at top of camera cable. Lift pressure wall to remove camera cable

iMac (27-inch, Mid 2010) — General Troubleshooting 262010-09-09TS2P Excessive upper internal enclosure temperature, or Skin temp sensor damaged/disco

iMac (27-inch, Mid 2010) Take Apart — Cable, AC/DC Power/Backlight/SATA 260 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supply•

iMac (27-inch, Mid 2010) Take Apart — Cable, AC/DC Power/Backlight/SATA 261 2010-09-09Removal1 Observe cable routing for reassembly. 2 Release cabl

iMac (27-inch, Mid 2010) Take Apart — Cable, AC/DC Power/Backlight/SATA, SSD 262 2010-09-09First Steps Remove• Glass panel • LCD panel• Power supp

iMac (27-inch, Mid 2010) Take Apart — Cable, AC/DC Power/Backlight/SATA, SSD 263 2010-09-09Removal1 Disconnect SSD drive power cable from top of SSD

iMac (27-inch, Mid 2010) Take Apart — Cable, AC/DC Power/Backlight/SATA, SSD 264 2010-09-09Replacement Note: The bottom section of cable bundle route

iMac (27-inch, Mid 2010) Take Apart — Microphone Cable 265 2010-09-09First Steps The microphone cable is part of the rear housing and is not availabl

iMac (27-inch, Mid 2010) Take Apart — Rear Housing 266 2010-09-09First Steps Remove• Glass panel• LCD panel • Camera• Bluetooth board• AirPort c

iMac (27-inch, Mid 2010) Take Apart — Rear Housing 267 2010-09-09ReassemblyWhen replacing the rear housing follow these important steps:1 Handling:

iMac (27-inch, Mid 2010) Take Apart — Rear Housing 268 2010-09-093 Remove foil tape and gaskets. Examine plastic tabs under foil tape. Notice that s

iMac (27-inch, Mid 2010) Take Apart — Rear Housing 269 2010-09-099 Transfer Camera and Reuse Thermal Paste:Transfer camera from old rear housing to

iMac (27-inch, Mid 2010) — General Troubleshooting 272010-09-09Sensor LocationsTemp sensors and fan connector locations are shown in the next two gra

iMac (27-inch, Mid 2010) Take Apart — Rear Housing 270 2010-09-0911 Place the two new pieces of aluminum tape over the right and left sides of the m

© 2010 Apple Inc. All rights reserved. Service Source Additional ProceduresiMac (27-inch, Mid 2010)

iMac (27-inch, Mid 2010) Additional Procedures — Retrieving Mechanism 272 2010-09-09OverviewWithout a stand or VESA mount installed, the mechanism ca

iMac (27-inch, Mid 2010) Additional Procedures — Retrieving Mechanism 273 2010-09-09Removal1 Place computer face down on a clean, soft surface.2 Pe

iMac (27-inch, Mid 2010) Additional Procedures — Retrieving Mechanism 274 2010-09-095 Notice shape of retrieval tool. When inserting retrieval tool,

iMac (27-inch, Mid 2010) Additional Procedures — Retrieving Mechanism 275 2010-09-0910 When you can pull up mechanism and see it emerge through slot,

© 2010 Apple Inc. All rights reserved. Service Source ViewsiMac (27-inch, Mid 2010)

iMac (27-inch, Mid 2010) Views — Exploded Views 277 2010-09-09Exploded ViewsExploded View #1

iMac (27-inch, Mid 2010) Views — Exploded Views 278 2010-09-09Exploded View #2

iMac (27-inch, Mid 2010) Views — Exploded Views 279 2010-09-09Exploded View #3

iMac (27-inch, Mid 2010) — General Troubleshooting 282010-09-09Sensor Connector Location: Back Side of Logic Board

iMac (27-inch, Mid 2010) Views — External Views 280 2010-09-09External ViewsRear View

iMac (27-inch, Mid 2010) Views — External Views 281 2010-09-09Ports1 - Headphone out/optical digital audio out port2 - Audio in/optical digital audio

iMac (27-inch, Mid 2010) Take Apart — Internal Views 282 2010-09-09Internal ViewsPhoto of Components below LCD

iMac (27-inch, Mid 2010) Take Apart — Internal Views 283 2010-09-09Photo of Components in the Rear Housing

iMac (27-inch, Mid 2010) Take Apart — Internal Views 284 2010-09-09Logic Board, Front Side

iMac (27-inch, Mid 2010) Take Apart — Internal Views 285 2010-09-09Logic Board, Back Side

iMac (27-inch, Mid 2010) Views — Screw Chart 286 2010-09-09Screw ChartNote: Screws are not to scale.922-9246T10 LCD panel (8)922-9239T10 Camera (2)92

iMac (27-inch, Mid 2010) Views — Screw Chart 287 2010-09-09922-9236T10Optical fan (1), CPU fan (2), Hard drive fan (1)922-6800T10Logic board, short (

iMac (27-inch, Mid 2010) — General Troubleshooting 292010-09-09Diagnostic LEDsThe iMac (27-inch, Mid 2010) computer has four built-in diagnostic LEDs

iMac (27-inch, Mid 2010) ContentsAbout This GuideUpdates 10Updated 9 September 2010 10Updated 9 August 2010 10Apple Technician Guide introduced 27

iMac (27-inch, Mid 2010) — General Troubleshooting 302010-09-09LED FunctionsLED #1 • Indicates that trickle voltage from power supply has been detec

iMac (27-inch, Mid 2010) — General Troubleshooting 312010-09-09LED Startup SequenceLED #1 = Power available. If no LED is visible:• Verify AC power

iMac (27-inch, Mid 2010) — General Troubleshooting 322010-09-09Logic Board Test PointsSome test points are accessible on the logic board when the LCD

iMac (27-inch, Mid 2010) — General Troubleshooting 332010-09-09Functional OverviewRefer to this diagram for symptoms related to logic board connector

iMac (27-inch, Mid 2010) — General Troubleshooting 342010-09-09Block DiagramRefer to this diagram to see how modules are interrelated.SO-DIMMAntennaA

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 35 2010-09-09Symptom ChartsFollow steps in the order indicated below. If an action resolv

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 36 2010-09-093. Press power button while monitoring diagnostic LEDs. Verify if LED #2 tu

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 37 2010-09-09Won’t Start UpQuick CheckSymptoms Quick CheckWon’t Start Up• No startup chi

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 38 2010-09-093. Wait 15 seconds after computer was powered down then disconnect AirPort

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 39 2010-09-09Intermittent ShutdownTroubleshooting Shutdown CausesAlways run the latest av

LED Functions 30LED Startup Sequence 31Logic Board Test Points 32Functional Overview 33Block Diagram 34Symptom Charts 35Startup and Power 35No

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 40 2010-09-093) Power-related system shut downs: • External power source was removed. Po

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 41 2010-09-09Quick CheckSymptoms Quick CheckIntermittent Shutdown• Powers o during star

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 42 2010-09-09Deep DiveCheck Result Action Code1. Activity related shutdowns: Reset SMC a

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 43 2010-09-097. Replace DC power cable, which supplies power to logic board, hard drive,

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 44 2010-09-09Kernel Panic, System CrashesQuick CheckSymptoms Quick CheckKernel Panic, Sys

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 45 2010-09-093. Use known-good SDRAM in the system. Verify if system start without kerne

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 46 2010-09-09No VideoUnlikely cause: hard drive, optical drive, speakers, camera, microph

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 47 2010-09-094. Pivot enclosure to access lower intake vent, and locate diagnostic LEDs

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 48 2010-09-09Corrupted VideoUnlikely cause: power supply, hard drive, optical drive, fans

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 49 2010-09-09Deep DiveCheck Result Action Code1. Boot from Install DVD and Verify if iss

Audio: Built-in Speakers Have Distorted Sound 97Audio: No Audio from Built-in Speakers 98Camera Issues 101FireWire Device Not Recognized 102USB De

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 50 2010-09-097. Disconnect DisplayPort cable between LCD display and logic board, and ve

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 51 2010-09-09Burnt Smell/OdorUnlikely cause: speakers, microphone, rear housingQuick Chec

iMac (27-inch, Mid 2010) Symptom Charts — Startup and Power 52 2010-09-093. Verify if source of odor can be located using your nose.Yes Check all AC

iMac (27-inch, Mid 2010) Symptom Charts — Display 53 2010-09-09DisplayBacklight Issue/No BacklightUnlikely cause: hard drive, optical drive, speakers

iMac (27-inch, Mid 2010) Symptom Charts — Display 54 2010-09-095. Shine bright (low heat) ashlight onto front of LCD. With computer powered ON veri

iMac (27-inch, Mid 2010) Symptom Charts — Display 55 2010-09-09Noise / Unstable FlickeringUnlikely cause: camera, microphoneQuick CheckSymptoms Quick

iMac (27-inch, Mid 2010) Symptom Charts — Display 56 2010-09-093. When display icker, verify whether one of the following symptoms occurred:• Flic

iMac (27-inch, Mid 2010) Symptom Charts — Display 57 2010-09-098. Verify if high pitch noise varies when adjusting brightness level up and down.Yes

iMac (27-inch, Mid 2010) Symptom Charts — Display 58 2010-09-09LCD Image IssuesUnlikely cause: power supply, hard drive, optical drive, fans, speaker

iMac (27-inch, Mid 2010) Symptom Charts — Display 59 2010-09-094. Verify if issue is bright or dark pixel anomalies.Yes Go to pixel anomalies.No Go

Camera 144Removal 145Reassembly 146LCD Panel 147Removal 148Handling the Panel 153Reassembly 154Vertical Sync Cable (Vsync) 157LED Temp Sensor

iMac (27-inch, Mid 2010) Symptom Charts — Display 60 2010-09-09Incorrect/Missing ColorsUnlikely cause: power supply, hard drive, optical drive, fans,

iMac (27-inch, Mid 2010) Symptom Charts — Display 61 2010-09-094. Set up computer side-by-side with a known-good, same-model computer showing same i

iMac (27-inch, Mid 2010) Symptom Charts — Display 62 2010-09-09Distorted/Blurred ImageUnlikely cause: power supply, hard drive, optical drive, fans,

iMac (27-inch, Mid 2010) Symptom Charts — Display 63 2010-09-093. Verify if issue is visible on an external display attached to mini DisplayPort.Yes

iMac (27-inch, Mid 2010) Symptom Charts — Display 64 2010-09-09Pixel AnomaliesUnlikely cause: logic btoard, power supply, hard drive, optical drive,

iMac (27-inch, Mid 2010) Symptom Charts — Display 65 2010-09-094. Determine if combination of bright/dark pixel defects exceed acceptable number. Se

iMac (27-inch, Mid 2010) Symptom Charts — Display 66 2010-09-09Vertical/Horizontal LinesUnlikely cause: power supply, hard drive, optical drive, fans

iMac (27-inch, Mid 2010) Symptom Charts — Display 67 2010-09-096. Verify if issue is still present with replacement logic board installed.Yes Go to

iMac (27-inch, Mid 2010) Symptom Charts — Display 68 2010-09-09Non-Uniform Brightness / ColorUnlikely cause: power supply, hard drive, optical drive,

iMac (27-inch, Mid 2010) Symptom Charts — Display 69 2010-09-09Cosmetic DefectsSymptoms Quick CheckCosmetic Defects to LCD• Cracked glass panel• Cr

Reassembly 193Optical Sensor Cable 195Optical Drive Fan 197SD Card Reader 199Removal 200Reassembly 201SD Card Reader Cable 202IR Board and Cabl

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 70 2010-09-09Mass StorageHard Drive Not RecognizedUnlikely cause: LCD panel, power supply, fan

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 71 2010-09-095. Check that the 4 wire SATA power cable (carrying 12v and 5v DC) is correctly

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 72 2010-09-0911. If restore from Install DVD is unsuccessful, startup a known-good Intel Mac

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 73 2010-09-093. With user’s permission, erase internal drive(s) containing Mac OS X, and rein

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 74 2010-09-09Hard Drive NoisyUnlikely cause: LCD panel, logic board, power supply, speakers, c

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 75 2010-09-096. Remove hard drive and verify if rubber vibration isolation grommets are prope

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 76 2010-09-09Optical Drive Not RecognizedUnlikely cause: LCD panel, power supply, fans, speake

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 77 2010-09-095. Connect original optical drive to known-good SATA cable. Verify if both CD an

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 78 2010-09-094. With known-good optical drive installed, test for media inject/eject. Verify

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 79 2010-09-09Deep DiveCheck Result Action Code1. Verify if media is free to spin without opti

Stand 248Removal 249Reassembly 250Mechanism 252Bluetooth Cable 254Camera Cable 257Cable, AC/DC Power/Backlight/SATA 260Cable, AC/DC Power/Backl

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 80 2010-09-09Optical Drive Not Performing to SpecicationsUnlikely cause: LCD panel, power sup

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 81 2010-09-096. Media that is out of balance may not perform well at higher speeds even thoug

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 82 2010-09-09Optical Drive NoisyUnlikely cause: LCD panel, power supply, fans, speakers, camer

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 83 2010-09-09SD Card Will Not Insert Into SlotUnlikely cause: LCD panel, logic board, optical

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 84 2010-09-09SD Card Not RecognizedUnlikely cause: LCD panel, logic board, optical drive, hard

iMac (27-inch, Mid 2010) Symptom Charts — Mass Storage 85 2010-09-095. Verify if a known-good unlocked SD card can now be correctly read and written

iMac (27-inch, Mid 2010) Symptom Charts — Communications 86 2010-09-09CommunicationsAirPort/Bluetooth IssuesQuick CheckSymptoms Quick CheckAirPort/Bl

iMac (27-inch, Mid 2010) Symptom Charts — Communications 87 2010-09-09Deep DiveCheck Result Action Code1. Open System Proler. AirPort is listed und

iMac (27-inch, Mid 2010) Symptom Charts — Communications 88 2010-09-096. (Bluetooth) Verify that computer and known-good Bluetooth device are both i

iMac (27-inch, Mid 2010) Symptom Charts — Communications 89 2010-09-09AirPort Card Kernel PanicQuick CheckSymptoms Quick CheckAirPort Card Kernel Pan

© 2009 Apple Inc. All rights reserved. Apple Technician GuideAbout This GuideiMac (27-inch, Mid 2010)

iMac (27-inch, Mid 2010) Symptom Charts — Communications 90 2010-09-09Ethernet Port/Device IssueUnlikely cause: LCD display, power supply, hard driv

iMac (27-inch, Mid 2010) Symptom Charts — Communications 91 2010-09-094. Check for speed and duplex issues on network. Open System Preference > N

iMac (27-inch, Mid 2010) Symptom Charts — Communications 92 2010-09-09Deep DiveCheck Result Action Code1. Without any wired input devices connected,

iMac (27-inch, Mid 2010) Symptom Charts — Communications 93 2010-09-098. With known-good Bluetooth mouse/trackpad paired, verify if the device stays

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 94 2010-09-09Input/Output DevicesApple Remote InoperableUnlikely cause: LCD display, p

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 95 2010-09-094. After clicking “Unpair”, verify if the computer now responds to the A

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 96 2010-09-09Audio: MicrophoneUnlikely cause: LCD display, power supply, hard drive, o

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 97 2010-09-095. Inspect microphone cable routing and verify if cable is pinched or da

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 98 2010-09-093. Connect external speakers or headphones to audio-out port and play a

iMac (27-inch, Mid 2010) Symptom Charts — Input/Output Devices 99 2010-09-09Deep DiveCheck Result Action Code1. Verify if boot chime is present when