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PowerBook G4 (17-inch) 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. In the case of the DC-in
board flex cable; the cable is forked with one path going to the Bluetooth board and the
other to the DC-in board.
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
Bluetooth antenna cable (to diversity
board in display panel assembly)
Bluetooth radio signal
AirPort Extreme antenna cable (to
diversity board in display panel assembly)
AirPort radio signal
AirPort Extreme antenna jumper AirPort radio signal
AirPort Extreme flex cable AirPort data / control
Sound board flex cable Sound in
Sound out
Internal speaker
Internal microphone
Sleep light
Speaker assembly cable Left speaker
Right speaker
Internal microphone
DC-in board cable (to logic board) Power to system and main battery
DC-in board flex cable Bluetooth data
Left USB connector
Left ambient light sensor
Fan (left) cable (to logic board) Power/control for left fan