Apple Macbook Pro Aluminum 13-Inch Black Laptop Keyb Technical Guide - Page 21

Functional Overview, Refer to this diagram for symptoms related to logic board connectors.

Page 21 highlights

MacBook (13-inch, Aluminum, Late 2008) General Troubleshooting - Functional Overview 21 Camera (includes AirPort, Bluetooth, camera, and ambient light sensor): • failure of any parts listed above • no keyboard backlight • no startup if AirPort cable short Right speaker/subwoofer: • no sound from right speaker or subwoofer • distorted sound from right or center Fan: • intermittent shutdown • freezes • noisy fan LCD, backlight: • no video on internal LCD • no backlight MagSafe connector (under logic board): • no power on • no battery charge Functional Overview Refer to this diagram for symptoms related to logic board connectors. Optical drive: • no optical drive visible • no startup from optical drive Hard drive: • no hard drive visible • no startup from hard drive Sleep LED, Infrared sensor, magnetic sleep sensor: • no sleep LED status • no infrared reception • no sleep when display closed • wakes from sleep • no video on internal display (sensor stuck) Trackpad, trackpad button thermal sensor: • no cursor movement • no click action • runs slow (no sensor input) Keyboard, power on button: • no power • nonresponsive keys Keyboard backlight: • no keyboard backlight Memory: • no startup • pointer unresponsive and kernel panic • video artifacts • 1 startup tone (no memory) • 3 startup tones (bad memory) Connectors on the other side of logic board: Heatsink thermal sensor • no startup • system shutdown Left speaker • no sound from left • distorted sound on left Microphone • no integrated sound input Battery (under logic board): • no power when battery only • no power on Battery indicator LEDs, battery button: • no battery error • no battery level while charging • no battery level shown when button pressed 2010-06-15

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MacBook (13-inch, Aluminum, Late 2008) General Troubleshooting — Functional Overview
21
2010-06-15
Functional Overview
Refer to this diagram for symptoms related to logic board connectors.
Fan:
• intermittent shutdown
• freezes
• noisy fan
Right speaker/subwoofer
:
• no sound from right speaker or
subwoofer
• distorted sound from right or
center
Camera (includes AirPort,
Bluetooth, camera, and ambient
light sensor):
• failure of any parts listed above
• no keyboard backlight
• no startup if AirPort cable short
LCD, backlight:
• no video on internal
LCD
• no backlight
Battery (under logic
board):
• no power when
battery only
• no power on
Battery indicator LEDs,
battery button:
• no battery error
• no battery level while
charging
• no battery level shown
when button pressed
Keyboard
backlight:
• no keyboard
backlight
Keyboard, power
on button:
• no power
• nonresponsive
keys
Trackpad, trackpad button thermal
sensor:
• no cursor movement
• no click action
• runs slow (no sensor input)
Sleep LED, Infrared sensor,
magnetic sleep sensor:
• no sleep LED status
• no infrared reception
no sleep when display closed
wakes from sleep
• no video on internal display (sensor
stuck)
Hard drive:
• no hard drive visible
• no startup from hard drive
Optical drive:
• no optical drive visible
• no startup from optical drive
MagSafe connector
(under logic board):
no power on
no battery charge
Memory:
• no startup
• pointer unresponsive
and kernel panic
video artifacts
1 startup tone
(no memory)
3 startup tones
(bad memory)
Connectors on the other
side of logic board:
Heatsink thermal sensor
no startup
system shutdown
Left speaker
no sound from left
distorted sound on left
Microphone
no integrated sound inpu
t