 Apple Technician Guide IMac 27-inch, Mid | Apple MD094LL/A

Apple Technician Guide

iMac (27-inch, Mid 2010)

2010-09-09

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Apple MD094LL/A manual  Apple Technician Guide IMac 27-inch, Mid

Contents

 Apple Technician Guide IMac 27-inch, Mid USA Troubleshooting Contents About This GuideBasics Symptom Charts General Information Take Apart LCD Panel Bluetooth Board Handling the Panel Vertical Sync Cable Vsync Video Card Views Additional Procedures  Apple Technician Guide About This Guide Updated 9 September UpdatesUpdated 9 August Feedback  Apple Technician Guide Basics Overview Product Configurations Identifying Features Safety Precautions Serial Number Location About the Indicator Light New Accessories Magic Trackpad Pairing the Magic Trackpad Batteries Apple Battery Charger  Apple Technician Guide Troubleshooting Wireless Troubleshooting General TroubleshootingUpdate System Software & Firmware Troubleshooting Theory Hardware vs. Software Common Reset Procedures Power On Self Test Post Resetting Parameter RAM Pram Resetting the System Management Controller SMC Starting Up in Safe Mode Removing the Battery, Measuring DC Voltage Sensors Errors DiagnosticsSensor Suggested Action Board Sensor cable if damaged Logic board this sensor is part Video card assembly Sensor Locations Sensor Connector Locations Top Side of Logic Board Sensor Connector Location Back Side of Logic Board Location of Diagnostic LEDs Diagnostic LEDs LED #1 LED FunctionsLED #2 LED #3 LED #1 + LED #2 = Power available, and system is powered on LED #1 = Power availableLED Startup Sequence Board, to enable backlight According to user setupLogic Board Test Points Function Functional Overview Refer to this diagram to see how modules are interrelated Block Diagram No Power, Dead Unit Symptom ChartsSymptoms Quick Check No Power, Dead Unit Check Result Action Code To Won’t Start Up symptom Safe Boot, Safe Mode? Symptoms Quick Check Won’t Start UpSequence and error codes, symbols for Won’t Start Up Go to AirPort Card Kernel Using a digital multimeterGo to Hard Drive Not Go to Optical Drive Not Intermittent Shutdown Troubleshooting Shutdown Causes Power-related system shut downs Make sure that power cord is securely attached Symptoms Quick Check Intermittent ShutdownPowers off during startup OS on an external drive. Verify Recognized symptom flow Hard drive, update OS withSupply replacement Cord and AC outlet, Verify if M23 X03X22 P17 Kernel Panic, System Crashes Symptoms Quick Check Kernel Panic, System CrashesAbout You need to restart your computer Kernel panic messages Go to AirPort/Bluetooth Go to Camera Issues orX01 Go to SD Card Not Go to Backlight Issue/No Symptoms Quick Check No VideoNo Video Go to Won’t Start Up Locate diagnostic LEDs on Diagnostic LEDs on edgeM03 L03 If issue cannot be seen in the screenshot then Symptoms Quick Check Corrupted VideoCorrupted Video Video drivers, software, or video/logic board M04 Resolved with replacement LCD panel Utility Diagnostic and enterDisconnect DisplayPort cable Yes Replace DisplayPort cable Cable and go to step Burnt Smell/Odor Symptoms Quick Check Burnt Smell/Odor No Power, Dead Unit symptom flow Uncategorized SymptomsSmfeedback2@apple.com Symptoms Quick Check Backlight Issue/No Backlight Backlight Issue/No Backlight Panel with correct backlight Panel. Run Apple Service Display Utility to verifyLogic board and LCD panel Display Display Backlight Issue / No Backlight Symptoms Quick Check Noise / Unstable FlickeringNoise / Unstable Flickering Utility to verify the resolution Run Apple Service Display Symptom flow Issue resolved When adjusting brightness levelTo Noise/Hum/Vibration LCD Image Issues Go to vertical/horizontal Go to pixel anomaliesLines Go to non-uniform Incorrect/Missing Colors Symptoms Quick Check Incorrect/Missing Colors L02 Yes Replace LCD panel. Run Clean outside of glass panel Symptoms Quick Check Distorted/Blurred ImageBoot from install DVD to determine if a potential Software issue exists Reinstalling internal DisplayPort Pixel Anomalies Do not replace LCD panel L08 Vertical/Horizontal Lines Symptoms Quick Check Vertical/Horizontal LinesNoise / Unstable Flickering M24 Issue 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 Drive No Boot Symptoms Quick Check Drive Not RecognizedError codes, symbols Hard Drive Not Recognized Power cable carrying 12v Check that the 4 wire Sata Yes Replace any damaged SataLogic board Reboot computer. Verify if Yes System boots successfully To user Go to Optical Drive Read Hard Drive Read/Write Errors H04 Mac OS without errorsIf computer starts up H03 Hum/Vibration symptom Symptoms Quick Check Hard Drive NoisyHard Drive Noisy Refer to Kbase article TS3204 Evaluating Hard drive H06Go to Fan Failures/Thermal Optical Drive Not Recognized Symptoms Quick Check Drive Not Recognized/Mount Not Recognized symptom flow Symptoms Quick Check Drive Won’t Accept MediaOptical Drive Won’t Accept/Eject Media Drive Won’t Eject Media Symptoms Quick Check Drive Read/Write Data Error Optical Drive Read/Write ErrorJ03 Drive SATA+Power cable Replace optical drive Install known-good opticalIssue resolved CD and DVD media. Verify if Diagnostics, replace optical Drive Symptoms Quick Check Optical Drive Not Performing to Optical Drive Not Performing to SpecificationsSpecifications Same type to rule out media issue Optical drive Running diagnostics, replace Optical Drive Noisy Symptoms Quick Check Optical Drive Noisy J04Test optical drive with different Compare system with similar Seat into slot Media Cards MMC SD Card Will Not Insert Into SlotVerify if known-good SD card Tighten SD reader board Now fits in slot Screws. Go to step SD Card Not Recognized Symptom Quick Check SD Card Not Recognized Correctly read and written Issue. See kBase #HT1365 Airport potential AirPort/Bluetooth IssuesKBase #HT1365 AirPort Potential source Interference N04 Html?path=AirPort/5.0/en M11 Bluetooth issues are resolvedDiscoverable mode. Verify if AirPort Card Kernel Panic Symptoms Quick Check AirPort Card Kernel Panic Symptoms Quick Check Ethernet Port/Device Issue Ethernet Port/Device Issue KBase #HT2532 Mac OS How to change the MTU for Wireless Input Device Does Not PairTroubleshooting purposes Html?path=Mac/10.6 Loses Connection symptom Go to Wireless Input Device Go to Wireless Input Device Loses Connection symptom Connector is damagedVerify System Preferences/Network settings Go to step With customer’s mouse Yes Apple Remote Inoperable Symptoms Quick Check Apple Remote Inoperable That computer now Yes Lens blocked or sensor notResponds to Apple Remote Audio Microphone Symptoms Quick Check Audio MicrophoneM09 Audio Built-in Speakers Have Distorted Sound Inspect microphone cable Yes Replace rear housingL14 Is normal during playback See kBase #TS1574 Troubleshooting issues Symptoms Quick CheckAudio No Audio from Built-in Speakers Audio Output and verify that Internal Device, replace audio cableBoard Go to System Preferences Go to step Quality is acceptable Set speaker balance 100% Persists, verify if symptom has Symptoms Quick Check Camera Issues Camera Issues For external FireWire drives, make sure any FireWire Device Not RecognizedUnplug all FireWire devices Mode. Verify if FireWire device Software on User account. Issue USB Device Not Recognized Symptoms Quick Check USB Device Not Recognized M15 Bluetooth not recognized Symptoms Quick Check Wired Keyboard Does Not Wired Keyboard Does Not Function ProperlyFunction Properly Go to Keyboard Specific Keys Do Not Respond Accept/Eject Media Go to Optical Drive Won’t Input Device Doesn’t Pair symptom flow to Wired Keyboard/Mouse Not RecognizedKeyboard Specific Keys Do Not Respond Troubleshooting Mighty Mouse and determining Clean your Mighty MouseGo to USB Device Not Not Function Properly Pair 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 Charge Batteries Apple Battery Charger Does Not Charge BatteriesP01 P10 Software is installed and up-to-date, and that Was installed in chargerVary from 80% to almost full Device is supported with user’s system Stand/Hinge Issues symptom flow Symptoms Quick Check Noise/Hum/VibrationUnstable Flickering symptom flow Noise/Hum/Vibration Go to Optical Drive Noisy Location table in GeneralGo to Audio Built-in Speakers Have Distorted Board. Go to Noise/Unstable Reinstall fans while carefully Yes From fan housingBeing used When working around an Energized system P04 Symptoms Quick Check Fan Failures / Thermal Issues Fan Failures / Thermal IssuesVerify that vents on bottom and back of system System feels very hot Symptoms Quick Check Stand/Hinge Issues Stand/Hinge IssuesX23 Manuals available at http//support.apple.com Physical Damage Symptoms Quick Check Physical DamageVerify if damage caused by user environment Broken glass  Service Source Take Apart Opening the Unit General InformationRequired Tools KBase #HT3452 Hand Tools for Desktop and Portable Repairs Required Special Tools for Glass Panel Cleaning Tools Starter Kit Do’s and Don’ts Cleaning & Handling the Glass Panel Handling a Broken Glass Panel How to Remove a Broken Glass Panel 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 IMac 27-inch, Mid 2010 Take Apart General Information Safety Logic Board Handling Reassembly StepsScrew Sizes First Steps Access DoorTools ESD mat and wrist strap Phillips #2 screwdriver Removal Memory Access doorRemove ESD mat and wrist strap Reassembly 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 Camera Removal Reassembly LCD Panel Remove 8 T10 screws Reassembly Note IMac 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 cable Important Handle LCD panel by the edges only Handling the Panel Connect 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 cable DisplayPort 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 Cable Also help keep audio cable aligned while tightening screws Magnetized Torx T8 screwdriver ESD-wrist strap and mat AirPort Antenna Disconnect antenna cable from AirPort card Magnetized Torx T6 screwdriver ESD-wrist strap and mat AirPort Card Hold card by edges and pull it out of the slot Remove 1 T6 screw 922-8579 Glass 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 Supply Longer self-tapping 922- 9593, long L Remove 4 T10 screws Self-tapping, 922- 6850, short S Route AC power inlet cable over power supply pressure wall Backlight Pressure Wall Glass panel LCD panel Power supply Lift 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 Cable Each hard drive manufacturer has a unique sensor cable Torx T10 screwdriver ESD-wrist strap and mat Optical Drive Removal 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 Cable IMac 27-inch, Mid 2010 Take Apart SD Card Reader Cable ESD-wrist strap and mat Black stick IR Board and Cable Removal Transfer this jumper if replacing the logic board Logic Board Power 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 housing Reassembly 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 SSD Removal Lift pressure wall and SSD drive from rear housing Use a black stick to pry pressure wall off rear housing Reassembly 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 Note Black stick ESD mat and wrist strap Battery Make 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 Sensor Release 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 Cover 922-6800 Peel up aluminum tapePry cover off mechanism No preliminary steps are required to remove the stand Stand Remove 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 supply Disconnect camera cable #5 from the top of logic board IMac 27-inch, Mid 2010 Take Apart Camera Cable Sata Cable, AC/DC Power/Backlight Removal SATA, SSD Disconnect SSD drive power cable from top of SSD drive 2010-09-09 Microphone Cable Refer to the rear housing procedure Rear 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 Mechanism Removal 2010-09-09 2010-09-09  Service Source Views Exploded View #1 Exploded Views Exploded View #2 Exploded View #3 Rear View External Views Ports Photo of Components below LCD Internal Views Photo of Components in the Rear Housing Logic Board, Front Side Logic Board, Back Side 922-9246 922-9239 922-4723 Screw Chart922-9247 922-8579 922-6850 922-9244 922-9593 922-9241 922-9243 922-9242 922-9238 922-9236 922-6800 922-9237922-8174 922-9488 922-7018 922-7971