Apple MacBook Pro 17-inch (original, Core 2 Duo, 2.4GHz, Late 2007 CTO, Early 2008, and Late 2008) - Manual (Page 156)

MacBook Pro 17-inch (original, Core 2 Duo, 2.4/2.6GHz, 2008) Troubleshooting — General Information 156
General Information
Wire and Flex Cables
Because of its extremely thin enclosure design and dispersed circuit board, the MacBook Pro
utilizes a large number of flex cables and variety of wire cable harnesses. Many of these cables
carry multiple types of signals.
Here is a list of the cables and the signals that run across them. If you notice a group of functions
not working, it is likely that the cable is not properly inserted or the connector is damaged.
Cable or Flex Cable Signal(s) Running Through It
SuperDrive flex SuperDrive data, power, and control signals
(cable select info)
Hard drive flex Hard drive power and data
Bluetooth power and data
Left I/O board flex Audio in and out
left USB (2 ports)
ExpressCard data, left ALS, AirPort
Power Button cable Power-on signal
Infrared Cable Infrared Power and data
Sleep LED cable Power to sleep LED
Main battery connector wire harness Battery power to main logic board
Speaker Assembly cable (left) Left speakers (2) audio
Speaker Assembly cable (right) Right speakers (2) audio
Internal microphone Internal microphone audio
Trackpad flex Trackpad data and power
Power on button
Keyboard backlight power
Sleep sense signal
Keyboard data
Bluetooth antenna cable assembly Bluetooth radio signal
AirPort Extreme antenna cable AirPort Radio signal
Left fan cable Power/control for left fan
Right fan cable Power/control for right fan
Display backlight cable (to logic board) Display backlight control
Inverter control signal (brightness)
iSight video signal cable Video power and signal from iSight camera
LVDS cable Video data
Thermal sensors (bottom case (2), heatsink) Internal temperature data