Manuals / Apple / Computer Equipment / Personal Computer

Apple MD094LL/A manual Video Card

Models: MD094LL/A

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Page 7

Reassembly 193

Optical Sensor Cable 195

Optical Drive Fan 197

SD Card Reader 199

Removal 200

Reassembly 201

SD Card Reader Cable 202

IR Board and Cable 204

Logic Board 206


Removal	207
Handling the Logic Board 209
Reassembly		210
Video Card	216
Solid State Drive (SSD) 219
Removal	220
Reassembly		222

SSD Data Cable 223

Optical/MXM Pressure Wall 225

Hard Drive Data Cable 227

Optical Drive Data Cable 230

Battery 232

Removal 233

Reassembly 233

Right Speaker 234

CPU Fan 236

Removal 237

Reassembly 238

Ambient Temp Sensor 239

Removal 240

Reassembly 240

Left Speaker 241

Removal 242

Reassembly 242

Hard Drive Fan 244

Mechanism Cover 246

Image 7

Apple MD094LL/A manual Video Card

Contents

 Apple Technician Guide IMac 27-inch, Mid USA Troubleshooting Contents About This GuideBasics Symptom Charts General Information Take ApartVertical Sync Cable Vsync Bluetooth Board LCD Panel Handling the PanelVideo Card Views Additional Procedures Apple Technician Guide About This Guide Feedback UpdatesUpdated 9 September Updated 9 August Apple Technician Guide Basics Overview Product Configurations Identifying FeaturesSafety Precautions Serial Number Location About the Indicator Light New Accessories Magic TrackpadPairing the Magic Trackpad Batteries Apple Battery Charger Apple Technician Guide Troubleshooting Troubleshooting Theory General TroubleshootingWireless Troubleshooting Update System Software & FirmwareHardware vs. Software Common Reset Procedures Power On Self Test PostResetting Parameter RAM Pram Resetting the System Management Controller SMCStarting Up in Safe Mode Removing the Battery, Measuring DC Voltage Suggested Action DiagnosticsSensors Errors SensorBoard Sensor cable if damaged Logic board this sensor is part Video card assemblySensor Locations Sensor Connector Locations Top Side of Logic BoardSensor Connector Location Back Side of Logic Board Location of Diagnostic LEDs Diagnostic LEDsLED #3 LED FunctionsLED #1 LED #2LED #1 + LED #2 = Power available, and system is powered on LED #1 = Power availableLED Startup Sequence Function According to user setupBoard, to enable backlight Logic Board Test PointsFunctional Overview Refer to this diagram to see how modules are interrelated Block DiagramCheck Result Action Code Symptom ChartsNo Power, Dead Unit Symptoms Quick Check No Power, Dead UnitTo Won’t Start Up symptom Won’t Start Up Symptoms Quick Check Won’t Start UpSafe Boot, Safe Mode? Sequence and error codes, symbols forGo to Optical Drive Not Using a digital multimeterGo to AirPort Card Kernel Go to Hard Drive NotIntermittent Shutdown Troubleshooting Shutdown CausesPower-related system shut downs Make sure that power cord is securely attached Symptoms Quick Check Intermittent ShutdownPowers off during startup Cord and AC outlet, Verify if Hard drive, update OS withOS on an external drive. Verify Recognized symptom flow Supply replacementP17 X03M23 X22Kernel panic messages Symptoms Quick Check Kernel Panic, System CrashesKernel Panic, System Crashes About You need to restart your computerGo to SD Card Not Go to Camera Issues orGo to AirPort/Bluetooth X01Go to Won’t Start Up Symptoms Quick Check No VideoGo to Backlight Issue/No No VideoL03 Diagnostic LEDs on edgeLocate diagnostic LEDs on M03Video drivers, software, or video/logic board Symptoms Quick Check Corrupted VideoIf issue cannot be seen in the screenshot then Corrupted VideoM04 Cable and go to step Utility Diagnostic and enterResolved with replacement LCD panel Disconnect DisplayPort cable Yes Replace DisplayPort cableBurnt Smell/Odor Symptoms Quick Check Burnt Smell/OdorNo Power, Dead Unit symptom flow Uncategorized SymptomsSmfeedback2@apple.com Symptoms Quick Check Backlight Issue/No Backlight Backlight Issue/No BacklightDisplay Panel. Run Apple Service Display Utility to verifyPanel with correct backlight Logic board and LCD panelDisplay Backlight Issue / No Backlight Symptoms Quick Check Noise / Unstable FlickeringNoise / Unstable Flickering Utility to verify the resolution Run Apple Service DisplaySymptom flow Issue resolved When adjusting brightness levelTo Noise/Hum/Vibration LCD Image Issues Go to non-uniform Go to pixel anomaliesGo to vertical/horizontal LinesIncorrect/Missing Colors Symptoms Quick Check Incorrect/Missing ColorsL02 Yes Replace LCD panel. RunSoftware issue exists Symptoms Quick Check Distorted/Blurred ImageClean outside of glass panel Boot from install DVD to determine if a potentialReinstalling internal DisplayPort Pixel Anomalies Do not replace LCD panel L08M24 Symptoms Quick Check Vertical/Horizontal LinesVertical/Horizontal Lines Noise / Unstable FlickeringIssue resolved. If video card Service Display Utility toL04 Service Display Utility. To Symptoms Quick Check Non-Uniform Brightness/ColorNon-Uniform Brightness / Color Cosmetic Defects Symptoms Quick Check Cosmetic Defects to LCDCracked glass panel Hard Drive Not Recognized Symptoms Quick Check Drive Not RecognizedDrive No Boot Error codes, symbolsSystem boots successfully To user Check that the 4 wire Sata Yes Replace any damaged SataPower cable carrying 12v Logic board Reboot computer. Verify if YesGo to Optical Drive Read Hard Drive Read/Write ErrorsH03 Mac OS without errorsH04 If computer starts upRefer to Kbase article TS3204 Evaluating Symptoms Quick Check Hard Drive NoisyHum/Vibration symptom Hard Drive NoisyHard drive H06Go to Fan Failures/Thermal Optical Drive Not Recognized Symptoms Quick Check Drive Not Recognized/MountDrive Won’t Eject Media Symptoms Quick Check Drive Won’t Accept MediaNot Recognized symptom flow Optical Drive Won’t Accept/Eject MediaSymptoms Quick Check Drive Read/Write Data Error Optical Drive Read/Write ErrorJ03 Diagnostics, replace optical Drive Replace optical drive Install known-good opticalDrive SATA+Power cable Issue resolved CD and DVD media. Verify ifSame type to rule out media issue Optical Drive Not Performing to SpecificationsSymptoms Quick Check Optical Drive Not Performing to SpecificationsOptical drive Running diagnostics, replaceCompare system with similar Symptoms Quick Check Optical Drive Noisy J04Optical Drive Noisy Test optical drive with differentTighten SD reader board Now fits in slot Screws. Go to step SD Card Will Not Insert Into SlotSeat into slot Media Cards MMC Verify if known-good SD cardSD Card Not Recognized Symptom Quick Check SD Card Not RecognizedCorrectly read and written Interference AirPort/Bluetooth IssuesIssue. See kBase #HT1365 Airport potential KBase #HT1365 AirPort Potential sourceN04 Html?path=AirPort/5.0/enM11 Bluetooth issues are resolvedDiscoverable mode. Verify if AirPort Card Kernel Panic Symptoms Quick Check AirPort Card Kernel PanicSymptoms Quick Check Ethernet Port/Device Issue Ethernet Port/Device IssueHtml?path=Mac/10.6 Wireless Input Device Does Not PairKBase #HT2532 Mac OS How to change the MTU for Troubleshooting purposesLoses Connection symptom Go to Wireless Input DeviceGo to step With customer’s mouse Yes Connector is damagedGo to Wireless Input Device Loses Connection symptom Verify System Preferences/Network settingsApple Remote Inoperable Symptoms Quick Check Apple Remote InoperableThat computer now Yes Lens blocked or sensor notResponds to Apple Remote Audio Microphone Symptoms Quick Check Audio MicrophoneM09 Is normal during playback Inspect microphone cable Yes Replace rear housingAudio Built-in Speakers Have Distorted Sound L14Audio Symptoms Quick CheckSee kBase #TS1574 Troubleshooting issues Audio No Audio from Built-in SpeakersGo to step Quality is acceptable Set speaker balance 100% Device, replace audio cableOutput and verify that Internal Board Go to System PreferencesPersists, verify if symptom has Symptoms Quick Check Camera Issues Camera IssuesMode. Verify if FireWire device FireWire Device Not RecognizedFor external FireWire drives, make sure any Unplug all FireWire devicesSoftware on User account. Issue USB Device Not Recognized Symptoms Quick Check USB Device Not RecognizedM15 Bluetooth not recognizedGo to Keyboard Specific Keys Do Not Respond Wired Keyboard Does Not Function ProperlySymptoms Quick Check Wired Keyboard Does Not Function ProperlyAccept/Eject Media Go to Optical Drive Won’tInput Device Doesn’t Pair symptom flow to Wired Keyboard/Mouse Not RecognizedKeyboard Specific Keys Do Not Respond Not Function Properly Clean your Mighty MouseTroubleshooting Mighty Mouse and determining Go to USB Device NotPair with computer Not charge batteries Not charge batteries Symptoms Quick Check Apple Wireless Mouse/Magic Apple Wireless Mouse/Magic Trackpad Erratic TrackingTrackpad erratic tracking Wireless Input Device Loses Connection K08 P10 Apple Battery Charger Does Not Charge BatteriesCharge Batteries P01Device is supported with user’s system Was installed in chargerSoftware is installed and up-to-date, and that Vary from 80% to almost fullNoise/Hum/Vibration Symptoms Quick Check Noise/Hum/VibrationStand/Hinge Issues symptom flow Unstable Flickering symptom flowBoard. Go to Noise/Unstable Location table in GeneralGo to Optical Drive Noisy Go to Audio Built-in Speakers Have DistortedP04 From fan housingReinstall fans while carefully Yes Being used When working around an Energized systemSystem feels very hot Fan Failures / Thermal IssuesSymptoms Quick Check Fan Failures / Thermal Issues Verify that vents on bottom and back of systemManuals available at http//support.apple.com Stand/Hinge IssuesSymptoms Quick Check Stand/Hinge Issues X23Broken glass Symptoms Quick Check Physical DamagePhysical Damage Verify if damage caused by user environment Service Source Take Apart KBase #HT3452 Hand Tools for Desktop and Portable Repairs General InformationOpening the Unit Required ToolsRequired Special Tools for Glass Panel Cleaning Tools Starter KitDo’s and Don’ts Cleaning & Handling the Glass PanelHandling a Broken Glass Panel How to Remove a Broken Glass PanelIMac 27-inch, Mid 2010 Take Apart General Information IMac 27-inch, Mid 2010 Take Apart General Information IMac 27-inch, Mid 2010 Take Apart General Information IMac 27-inch, Mid 2010 Take Apart General Information Safety Logic Board Handling Reassembly StepsScrew Sizes ESD mat and wrist strap Phillips #2 screwdriver Access DoorFirst Steps ToolsRemoval ESD mat and wrist strap Access doorMemory RemoveReassembly Shut down unit Unplug all cables Put on ESD strap Glass PanelMicrofoam bag Removal Reassembly Set unit in upright position to minimize settling of dust IMac 27-inch, Mid 2010 Take Apart Glass Panel Glass panel CameraRemoval Reassembly LCD Panel Remove 8 T10 screws Reassembly NoteIMac 27-inch, Mid 2010 Take Apart LCD Panel Pull display forward slightly to disconnect Important Panel Handling information Mylar tape Aluminum tape Replacement LCD panel includes Vsync cableImportant Handle LCD panel by the edges only Handling the PanelConnect the DisplayPort cable IMac 27-inch, Mid 2010 Take Apart LCD Panel IMac 27-inch, Mid 2010 Take Apart LCD Panel Vertical Sync Cable Vsync Pull cable straight out of connectorGlass panel LCD panel LED Temp Sensor Cable Peel black insulator to access cableDisplayPort Cable No tools are required for this procedurePeel back mylar tape securing cable to LCD panel IMac 27-inch, Mid 2010 Take Apart DisplayPort Cable Torx T10 screwdriver ESD mat and wrist strap Audio Ports and CableAlso help keep audio cable aligned while tightening screws Magnetized Torx T8 screwdriver ESD-wrist strap and mat AirPort AntennaDisconnect antenna cable from AirPort card Magnetized Torx T6 screwdriver ESD-wrist strap and mat AirPort CardHold card by edges and pull it out of the slot Remove 1 T6 screw 922-8579Glass panel LCD panel AirPort card AirPort Carrier BoardMagnetized Torx T10 screwdriver ESD-wrist strap and mat Disconnect Airport data cable Remove 2 T10 screws 922-6850 Glass panel LCD panel AirPort carrier board AirPort CableTools ESD-wrist strap and matt Black stick Removal Bluetooth Antenna Disconnect Bluetooth antenna from the Bluetooth card Bluetooth Board Removal LED Backlight Board Removal Voltage Power SupplyLonger self-tapping 922- 9593, long L Remove 4 T10 screws Self-tapping, 922- 6850, short SRoute AC power inlet cable over power supply pressure wall Backlight Pressure Wall Glass panel LCD panel Power supplyLift pressure wall off posts in the rear housing Power Supply/Hard drive Pressure Wall Lift pressure wall off posts in the rear housing Replace Kapton tape securing AC inlet cable to pressure wall Hard Drive Removal Orient drive with circuit board facing up as shown Glass panel LCD panel Hard drive Hard Drive Sensor CableEach hard drive manufacturer has a unique sensor cable Torx T10 screwdriver ESD-wrist strap and mat Optical DriveRemoval IMac 27-inch, Mid 2010 Take Apart Optical Drive Reassembly Replace screws in order shown Glass panel LCD panel Optical drive Optical Sensor CableTools ESD-wrist strap and mat Peel up foam gasket to release sensor end of cable Optical Drive Fan Remove 1 T10 screw 922-9236 EEE code SD Card ReaderTorx T8 screwdriver ESD-wrist strap and mat Black stick Removal Reassembly Glass panel LCD panel Optical drive Optical drive fan SD Card Reader CableIMac 27-inch, Mid 2010 Take Apart SD Card Reader Cable ESD-wrist strap and mat Black stick IR Board and CableRemoval Transfer this jumper if replacing the logic board Logic BoardPower button CPU fan Skin temp sensor 922-6800, 2 short 922-9237, 2 20mm, medium Handling Logic Board Carefully lift board up and out of rear housingReassembly IMac 27-inch, Mid 2010 Take Apart Logic Board IMac 27-inch, Mid 2010 Take Apart Logic Board IMac 27-inch, Mid 2010 Take Apart Logic Board Hard drive temp sensor or HD jumper if SSD-only config IMac 27-inch, Mid 2010 Take Apart Logic Board Video Card Removal IMac 27-inch, Mid 2010 Take Apart Video Card Torx T8 screwdriver Black stick ESD-wrist strap and mat Solid State Drive SSDRemoval Lift pressure wall and SSD drive from rear housing Use a black stick to pry pressure wall off rear housingReassembly SSD Data Cable Disconnect SSD data cable from top of SSD drive Optical/MXM Pressure Wall Remove 1 T8 screw on pressure wall Hard Drive Data Cable Removal IMac 27-inch, Mid 2010 Take Apart Hard Drive Data Cable Optical Drive Data Cable Disconnect optical data cable from back side of logic board Replacement NoteBlack stick ESD mat and wrist strap BatteryMake sure battery socket is open and free of dust Right Speaker Removal CPU Fan Remove 2 T10 shoulder screws Route sensor cable through clip on fan Black stick ESD-wrist strap and mat Ambient Temp SensorRelease sensor cable from 2 cable clips on CPU fan Left Speaker Removal IMac 27-inch, Mid 2010 Take Apart Left Speaker Hard Drive Fan Removal ESD-wrist strap and mat Magnetized Torx T10 screwdriver Mechanism Cover922-6800 Peel up aluminum tapePry cover off mechanism No preliminary steps are required to remove the stand StandRemove the access card Remove 8 T10 screws 922-8174 Stand the computer upright Mechanism Remove 6 T10 screws 922-9238 Lift mechanism off rear housing Bluetooth Cable Removal IMac 27-inch, Mid 2010 Take Apart Bluetooth Cable Camera Cable Glass panel LCD panel Camera Hard drive Power supplyDisconnect camera cable #5 from the top of logic board IMac 27-inch, Mid 2010 Take Apart Camera Cable Sata Cable, AC/DC Power/BacklightRemoval SATA, SSD Disconnect SSD drive power cable from top of SSD drive 2010-09-09 Microphone Cable Refer to the rear housing procedureRear Housing When replacing the rear housing follow these important steps Reinstall 4 screws Transfer Camera and Reuse Thermal Paste IMac 27-inch, Mid 2010 Take Apart Rear Housing  Service Source Additional Procedures Overview Retrieving MechanismRemoval 2010-09-09 2010-09-09  Service Source Views Exploded View #1 Exploded ViewsExploded View #2 Exploded View #3 Rear View External ViewsPorts Photo of Components below LCD Internal ViewsPhoto of Components in the Rear Housing Logic Board, Front Side Logic Board, Back Side 922-9244 922-9593 922-9241 Screw Chart922-9246 922-9239 922-4723 922-9247 922-8579 922-6850922-7971 922-9236 922-6800 922-9237922-9243 922-9242 922-9238 922-8174 922-9488 922-7018