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Troubleshooting General/ Logic Board Troubleshooting - 17
Note:
This procedure resets the computer’s PRAM. Be sure to
check the computer’s time/date and other system parameter
settings afterwards.
Logic Board LEDs: Power Macintosh G4 (PCI Graphics)
There are seven diagnostic LEDs on the Power Mac G4 (PCI
Graphics) logic board. A graphic follows showing their location.
DS1 = ATA drive activity
If a CD and/or Zip are attached to the ATA bus, this LED will
illuminate at power/on restart time for a few seconds. After that,
it is unlikely it will illuminate again in a trouble-free system. If
this light stays on for a prolonged period, this is a sign of trouble
on the ATA bus. If devices are connected to the ATA bus and this LED
is dark at boot time, that is also likely a sign of trouble. If a hard
disk drive is attached to this bus, the LED flickers regularly
indicating drive activity (reads/writes).