MacBook Pro (13-inch) General Troubleshooting — Functional Overview 22
2010-09-14
Functional Overview
Refer to this diagram for symptoms related to logic board connectors.
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Battery Indicator LEDs
+ Battery Level button
+ Magnetic Sleep
Sensor:
- no battery level while
charging
no battery level shown
when button pressed
- no sleep when
clamshell closed,
- no video on internal
display (sleep sensor
stuck)
MagSafe Connector
(underneath logic
board):
- no Power ON
- no Battery charge
- no LED light from
MagSafe connector
Ram:
- no boot,
- freezes or kernel panic
- video artifacts
Right Speaker + Subwoofer:
- no sound from right speaker
or subwoofer
- distorted right or center sound
Fan :
- intermittent shutdown
- freezes
- fan running at full
speed
LCD + Backlight:
- no internal LCD video
- no internal LCD backlight
Right Clutch Camera
Cable, with connections to
AirPort, Bluetooth, Camera
and Ambient Light Sensor:
- failing to communicate with
any of these devices
- no keyboard backlight or
display not dimming in low
light while ALS is covered
- no startup (if shorted Airport
cable)
Sata Optical Drive:
- no Optical Drive seen in
System Profiler,
- no startup possible from
bootable optical media
Sata Hard Drive
+ Sleep LED
+ Infrared (IR) Sensor:
- no HDD visible in system
profiler
- no sleep led status
- no infrared reception
- no power on (if shorting
SMC)
Trackpad + Trackpad
Button + Trackpad Thermal
Sensor:
- no cursor movement,
- no click action
- unit running slow (missing
trackpad sensor input)
Keyboard
+ Power ON Button:
- no power on with
keyboard
- dead keys
Keyboard Backlight:
- no keyboard backlight
Battery:
- not running from battery only
- no power on (if incorrect power
adapter is used)
- no battery seen in menubar
- fan running faster (high
temperature from battery sensor)
Connectors located on
the other side of the
logic board:
Left Speaker
- no left sound,
- distorted left sound
Microphone
- no input level from
Internal Microphone
sound input
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