> I have already replaced the motherboard to no effect, and just finished
> replacing the entire lid/display unit, but still have no video. My
[quoted text clipped - 15 lines]
> Dave
> db5151@hotmail.com
On some desktop models from the same era (Powermac 6100 IIRC) this was
frequently caused by a dead PRAM battery.
From apple powerbook 5300 repair pdf (pretty sure when they say backup
battery they mean the PRAM battery, not the main battery that powers the
computer when unplugged from AC):
> If sleep LED is continually on, backup battery power has
> been interrupted. Restart computer by holding down reset
> actuator 10-20 seconds. If computer doesn’t restart, repeat
> 3–4 times.
If there is any chance the PRAM battery might charge, leave computer
plugged in about 48 hours, that should supply the PRAM battery with
power to recharge. Otherwise it may be dead, or there may be something
even more serious wrong. Is the power adapter and/or main battery
definitely good? Search Ebay for PRAM battery replacement?
If all attempts to turn it on fail, you may be able to copy your info
out two ways:
1) SCSI disk mode - connecting the powerbook to a desktop mac with a
special SCSI cable (HD-30 male to DB-25 male with disk mode switch built
in I think).
2) pull internal IDE hard disk out, attach to 2.5 inch to 3.5 inch
adapter, connect to newer IDE desktop mac or PC with MacDrive (to read
Mac format disk)