LED Startup Sequence 25
Logic Board Test Points 26
Sensor and Fan Connector Locations 27
Block Diagram 28
Symptom Charts 29
Startup and Power 29
No Power, Dead Unit 29
Won’t Start Up 31
Intermittent Shutdown 33
Kernel Panic, System Crashes 35
No Video 37
Corrupted Video 39
Burnt Smell/Odor 41
Uncategorized Symptoms 42
Display 43
Backlight Issue/No Backlight 43
Noise / Unstable Flickering 45
LCD Image Issues 47
Incorrect/Missing Colors 48
Distorted/Blurred Image 49
Pixel Anomalies 51
Vertical/Horizontal Lines 52
Non-Uniform Brightness 54
Cosmetic Defects 55
Uncategorized Symptoms 55
Mass Storage 56
Hard Drive Not Recognized 56
Hard Drive Read/Write Errors 58
Hard Drive Noisy 59
Optical Drive Not Recognized 61
Optical Drive Won’t Accept/Eject Media 62
Optical Drive Read/Write Error 63
Optical Drive Not Performing to Specications 65
Optical Drive Noisy 66
SD Card Will Not Insert Into Slot 67
SD Card Not Recognized 68
Uncategorized Symptoms 69
Communications 70
AirPort/Bluetooth Issues 70
AirPort Card Kernel Panic 72
Ethernet Port/Device Issue 73
Wireless Input Device Doesn’t Pair 74
Wireless Input Device Loses Connection 76
Uncategorized Symptoms 78
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