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PowerBook G4 (15-inch FW 800_1.5/1.33GHz) Troubleshooting - 1
General Information
General Information
Wire and Flex Cables
With the very thin enclosure design and dispersed circuit board, a large number of flex
cables are used in this computer. In addition, there are a variety of wire cable harnesses
as well. 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 Name Signal(s) Running Through It
AirPort Extreme/Bluetooth antenna
assembly
(in display housing to diversity board)
AirPort/Bluetooth radio signals
AirPort Extreme antenna cable extension
(to AirPort card cage)
AirPort radio signal
AirPort Extreme Flex (to logic board) AirPort data / power
Ambient Light Sensor (Left) cable Light data from left side
Bluetooth cable (to Sound/DC-in board) Bluetooth data/power
Blower, left cable (to logic board) Power/control for left blower
Blower, right cable (to logic board) Power/control for right blower
Hard drive flex (to logic board) Hard drive control, data, and power
Inverter cable (from display panel) High voltage for backlight
Inverter/antenna cable (to logic board and
wireless modules)
Display backlight control
AirPort radio signal
Bluetooth radio signal
Keyboard backlight cable (on top case) Power to keyboard backlight LEDs
Keyboard flex (from keyboard) Keyboard data and status lines
LVDS cable (from display housing) Video data to display panel