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Apple MD094LL/A manual Logic Board, Front Side

Models: MD094LL/A

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Logic Board, Front Side

2010-09-09

iMac (27-inch, Mid 2010) Take Apart — Internal Views 284

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Apple MD094LL/A manual Logic Board, Front Side

Contents

 Apple Technician Guide IMac 27-inch, Mid USA Basics Contents About This GuideTroubleshooting Symptom Charts Take Apart General Information Bluetooth Board LCD Panel Handling the Panel Vertical Sync Cable Vsync Video Card Additional Procedures Views Apple Technician Guide About This Guide Updates Updated 9 SeptemberUpdated 9 August Feedback Apple Technician Guide Basics Overview Identifying Features Product ConfigurationsSafety Precautions Serial Number Location New Accessories Magic Trackpad About the Indicator LightPairing the Magic Trackpad Apple Battery Charger Batteries Apple Technician Guide Troubleshooting General Troubleshooting Wireless TroubleshootingUpdate System Software & Firmware Troubleshooting TheoryCommon Reset Procedures Power On Self Test Post Hardware vs. SoftwareResetting the System Management Controller SMC Resetting Parameter RAM PramStarting Up in Safe Mode Removing the Battery, Measuring DC Voltage Diagnostics Sensors ErrorsSensor Suggested ActionLogic board this sensor is part Video card assembly Board Sensor cable if damagedSensor Connector Locations Top Side of Logic Board Sensor LocationsSensor Connector Location Back Side of Logic Board Diagnostic LEDs Location of Diagnostic LEDsLED Functions LED #1LED #2 LED #3LED Startup Sequence LED #1 = Power availableLED #1 + LED #2 = Power available, and system is powered on According to user setup Board, to enable backlightLogic Board Test Points FunctionFunctional Overview Block Diagram Refer to this diagram to see how modules are interrelatedSymptom Charts No Power, Dead UnitSymptoms Quick Check No Power, Dead Unit Check Result Action CodeTo Won’t Start Up symptom Symptoms Quick Check Won’t Start Up Safe Boot, Safe Mode?Sequence and error codes, symbols for Won’t Start UpUsing a digital multimeter Go to AirPort Card KernelGo to Hard Drive Not Go to Optical Drive NotTroubleshooting Shutdown Causes Intermittent ShutdownPower-related system shut downs Powers off during startup Symptoms Quick Check Intermittent ShutdownMake sure that power cord is securely attached Hard drive, update OS with OS on an external drive. Verify Recognized symptom flowSupply replacement Cord and AC outlet, Verify ifX03 M23X22 P17Symptoms Quick Check Kernel Panic, System Crashes Kernel Panic, System CrashesAbout You need to restart your computer Kernel panic messagesGo to Camera Issues or Go to AirPort/BluetoothX01 Go to SD Card NotSymptoms Quick Check No Video Go to Backlight Issue/NoNo Video Go to Won’t Start UpDiagnostic LEDs on edge Locate diagnostic LEDs onM03 L03Symptoms Quick Check Corrupted Video If issue cannot be seen in the screenshot thenCorrupted Video Video drivers, software, or video/logic boardM04 Utility Diagnostic and enter Resolved with replacement LCD panelDisconnect DisplayPort cable Yes Replace DisplayPort cable Cable and go to stepSymptoms Quick Check Burnt Smell/Odor Burnt Smell/OdorSmfeedback2@apple.com Uncategorized SymptomsNo Power, Dead Unit symptom flow Backlight Issue/No Backlight Symptoms Quick Check Backlight Issue/No BacklightPanel. Run Apple Service Display Utility to verify Panel with correct backlightLogic board and LCD panel DisplayNoise / Unstable Flickering Symptoms Quick Check Noise / Unstable FlickeringDisplay Backlight Issue / No Backlight Run Apple Service Display Utility to verify the resolutionTo Noise/Hum/Vibration When adjusting brightness levelSymptom flow Issue resolved LCD Image Issues Go to pixel anomalies Go to vertical/horizontalLines Go to non-uniformSymptoms Quick Check Incorrect/Missing Colors Incorrect/Missing ColorsYes Replace LCD panel. Run L02Symptoms Quick Check Distorted/Blurred Image Clean outside of glass panelBoot from install DVD to determine if a potential Software issue existsReinstalling internal DisplayPort Pixel Anomalies L08 Do not replace LCD panelSymptoms Quick Check Vertical/Horizontal Lines Vertical/Horizontal LinesNoise / Unstable Flickering M24L04 Service Display Utility toIssue resolved. If video card Non-Uniform Brightness / Color Symptoms Quick Check Non-Uniform Brightness/ColorService Display Utility. To Cracked glass panel Symptoms Quick Check Cosmetic Defects to LCDCosmetic Defects Symptoms Quick Check Drive Not Recognized Drive No BootError codes, symbols Hard Drive Not RecognizedCheck that the 4 wire Sata Yes Replace any damaged Sata Power cable carrying 12vLogic board Reboot computer. Verify if Yes System boots successfully To userHard Drive Read/Write Errors Go to Optical Drive ReadMac OS without errors H04If computer starts up H03Symptoms Quick Check Hard Drive Noisy Hum/Vibration symptomHard Drive Noisy Refer to Kbase article TS3204 EvaluatingGo to Fan Failures/Thermal H06Hard drive Symptoms Quick Check Drive Not Recognized/Mount Optical Drive Not RecognizedSymptoms Quick Check Drive Won’t Accept Media Not Recognized symptom flowOptical Drive Won’t Accept/Eject Media Drive Won’t Eject MediaJ03 Optical Drive Read/Write ErrorSymptoms Quick Check Drive Read/Write Data Error Replace optical drive Install known-good optical Drive SATA+Power cableIssue resolved CD and DVD media. Verify if Diagnostics, replace optical DriveOptical Drive Not Performing to Specifications Symptoms Quick Check Optical Drive Not Performing toSpecifications Same type to rule out media issueRunning diagnostics, replace Optical driveSymptoms Quick Check Optical Drive Noisy J04 Optical Drive NoisyTest optical drive with different Compare system with similarSD Card Will Not Insert Into Slot Seat into slot Media Cards MMCVerify if known-good SD card Tighten SD reader board Now fits in slot Screws. Go to stepSymptom Quick Check SD Card Not Recognized SD Card Not RecognizedCorrectly read and written AirPort/Bluetooth Issues Issue. See kBase #HT1365 Airport potentialKBase #HT1365 AirPort Potential source InterferenceHtml?path=AirPort/5.0/en N04Discoverable mode. Verify if Bluetooth issues are resolvedM11 Symptoms Quick Check AirPort Card Kernel Panic AirPort Card Kernel PanicEthernet Port/Device Issue Symptoms Quick Check Ethernet Port/Device IssueWireless Input Device Does Not Pair KBase #HT2532 Mac OS How to change the MTU forTroubleshooting purposes Html?path=Mac/10.6Go to Wireless Input Device Loses Connection symptomConnector is damaged Go to Wireless Input Device Loses Connection symptomVerify System Preferences/Network settings Go to step With customer’s mouse YesSymptoms Quick Check Apple Remote Inoperable Apple Remote InoperableResponds to Apple Remote Yes Lens blocked or sensor notThat computer now M09 Symptoms Quick Check Audio MicrophoneAudio Microphone Inspect microphone cable Yes Replace rear housing Audio Built-in Speakers Have Distorted SoundL14 Is normal during playbackSymptoms Quick Check See kBase #TS1574 Troubleshooting issuesAudio No Audio from Built-in Speakers AudioDevice, replace audio cable Output and verify that InternalBoard Go to System Preferences Go to step Quality is acceptable Set speaker balance 100%Persists, verify if symptom has Camera Issues Symptoms Quick Check Camera IssuesFireWire Device Not Recognized For external FireWire drives, make sure anyUnplug all FireWire devices Mode. Verify if FireWire deviceSoftware on User account. Issue Symptoms Quick Check USB Device Not Recognized USB Device Not RecognizedBluetooth not recognized M15Wired Keyboard Does Not Function Properly Symptoms Quick Check Wired Keyboard Does NotFunction Properly Go to Keyboard Specific Keys Do Not RespondGo to Optical Drive Won’t Accept/Eject MediaKeyboard Specific Keys Do Not Respond Wired Keyboard/Mouse Not RecognizedInput Device Doesn’t Pair symptom flow to Clean your Mighty Mouse Troubleshooting Mighty Mouse and determiningGo to USB Device Not Not Function ProperlyPair with computer Not charge batteries Not charge batteries Trackpad erratic tracking Apple Wireless Mouse/Magic Trackpad Erratic TrackingSymptoms Quick Check Apple Wireless Mouse/Magic Wireless Input Device Loses Connection K08 Apple Battery Charger Does Not Charge Batteries Charge BatteriesP01 P10Was installed in charger Software is installed and up-to-date, and thatVary from 80% to almost full Device is supported with user’s systemSymptoms Quick Check Noise/Hum/Vibration Stand/Hinge Issues symptom flowUnstable Flickering symptom flow Noise/Hum/VibrationLocation table in General Go to Optical Drive NoisyGo to Audio Built-in Speakers Have Distorted Board. Go to Noise/UnstableFrom fan housing Reinstall fans while carefully YesBeing used When working around an Energized system P04Fan Failures / Thermal Issues Symptoms Quick Check Fan Failures / Thermal IssuesVerify that vents on bottom and back of system System feels very hotStand/Hinge Issues Symptoms Quick Check Stand/Hinge IssuesX23 Manuals available at http//support.apple.comSymptoms Quick Check Physical Damage Physical DamageVerify if damage caused by user environment Broken glass Service Source Take Apart General Information Opening the UnitRequired Tools KBase #HT3452 Hand Tools for Desktop and Portable RepairsCleaning Tools Starter Kit Required Special Tools for Glass PanelCleaning & Handling the Glass Panel Do’s and Don’tsHow to Remove a Broken Glass Panel Handling 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 Screw Sizes Reassembly StepsLogic Board Handling Access Door First StepsTools ESD mat and wrist strap Phillips #2 screwdriverRemoval Access door MemoryRemove ESD mat and wrist strapReassembly Microfoam bag Glass PanelShut down unit Unplug all cables Put on ESD strap Removal Reassembly Set unit in upright position to minimize settling of dust IMac 27-inch, Mid 2010 Take Apart Glass Panel Camera Glass panelRemoval Reassembly LCD Panel Reassembly Note Remove 8 T10 screwsIMac 27-inch, Mid 2010 Take Apart LCD Panel Pull display forward slightly to disconnect Important Panel Handling information Replacement LCD panel includes Vsync cable Mylar tape Aluminum tapeHandling the Panel Important Handle LCD panel by the edges onlyConnect the DisplayPort cable IMac 27-inch, Mid 2010 Take Apart LCD Panel IMac 27-inch, Mid 2010 Take Apart LCD Panel Glass panel LCD panel Pull cable straight out of connectorVertical Sync Cable Vsync Peel black insulator to access cable LED Temp Sensor CablePeel back mylar tape securing cable to LCD panel No tools are required for this procedureDisplayPort Cable IMac 27-inch, Mid 2010 Take Apart DisplayPort Cable Audio Ports and Cable Torx T10 screwdriver ESD mat and wrist strapAlso help keep audio cable aligned while tightening screws AirPort Antenna Magnetized Torx T8 screwdriver ESD-wrist strap and matDisconnect antenna cable from AirPort card AirPort Card Magnetized Torx T6 screwdriver ESD-wrist strap and matRemove 1 T6 screw 922-8579 Hold card by edges and pull it out of the slotMagnetized Torx T10 screwdriver ESD-wrist strap and mat AirPort Carrier BoardGlass panel LCD panel AirPort card Disconnect Airport data cable Remove 2 T10 screws 922-6850 Tools ESD-wrist strap and matt Black stick AirPort CableGlass panel LCD panel AirPort carrier board Removal Bluetooth Antenna Disconnect Bluetooth antenna from the Bluetooth card Bluetooth Board Removal LED Backlight Board Removal Power Supply VoltageRemove 4 T10 screws Self-tapping, 922- 6850, short S Longer self-tapping 922- 9593, long LRoute AC power inlet cable over power supply pressure wall Glass panel LCD panel Power supply Backlight Pressure WallLift 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 Hard Drive Sensor Cable Glass panel LCD panel Hard driveEach hard drive manufacturer has a unique sensor cable Optical Drive Torx T10 screwdriver ESD-wrist strap and matRemoval IMac 27-inch, Mid 2010 Take Apart Optical Drive Reassembly Replace screws in order shown Tools ESD-wrist strap and mat Optical Sensor CableGlass panel LCD panel Optical drive Peel up foam gasket to release sensor end of cable Optical Drive Fan Remove 1 T10 screw 922-9236 Torx T8 screwdriver ESD-wrist strap and mat Black stick SD Card ReaderEEE code Removal Reassembly SD Card Reader Cable Glass panel LCD panel Optical drive Optical drive fanIMac 27-inch, Mid 2010 Take Apart SD Card Reader Cable IR Board and Cable ESD-wrist strap and mat Black stickRemoval Logic Board Transfer this jumper if replacing the logic boardPower button CPU fan Skin temp sensor 922-6800, 2 short 922-9237, 2 20mm, medium Carefully lift board up and out of rear housing Handling Logic BoardReassembly 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 Solid State Drive SSD Torx T8 screwdriver Black stick ESD-wrist strap and matRemoval Use a black stick to pry pressure wall off rear housing Lift pressure wall and SSD drive from 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 Replacement Note Disconnect optical data cable from back side of logic boardBattery Black stick ESD mat and wrist strapMake 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 Ambient Temp Sensor Black stick ESD-wrist strap and matRelease 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 Mechanism Cover ESD-wrist strap and mat Magnetized Torx T10 screwdriverPry cover off mechanism Peel up aluminum tape922-6800 Stand No preliminary steps are required to remove the 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 Glass panel LCD panel Camera Hard drive Power supply Camera CableDisconnect camera cable #5 from the top of logic board IMac 27-inch, Mid 2010 Take Apart Camera Cable Cable, AC/DC Power/Backlight SataRemoval SATA, SSD Disconnect SSD drive power cable from top of SSD drive 2010-09-09 Refer to the rear housing procedure Microphone CableRear 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 Retrieving Mechanism OverviewRemoval 2010-09-09 2010-09-09  Service Source Views Exploded Views Exploded View #1Exploded View #2 Exploded View #3 External Views Rear ViewPorts Internal Views Photo of Components below LCDPhoto of Components in the Rear Housing Logic Board, Front Side Logic Board, Back Side Screw Chart 922-9246 922-9239 922-4723922-9247 922-8579 922-6850 922-9244 922-9593 922-9241922-9236 922-6800 922-9237 922-9243 922-9242 922-9238922-8174 922-9488 922-7018 922-7971