I have an OLD PowerBook G3 and it won't work now.

I have aquired an old PowerBook G3 400 Mhz with FireWire and it has been sitting collection dust for quite a while. It will not turn on at all. I have the batter in the left bay and the right bay has nothing, not weight saver or anything in it, and it is plugged in over ac. I have tried 2 power adapters, an apple one and a 3rd party one. The computer does not do anything, no lights or noises. The lights on the battery don't light up either. Does anyone know what could be the problem?
Thanks

Start with this article:
50959- Troubleshooting portables that won't turn on or start up
If none of those helps, remove the main battery and try the list again. Operating without a battery may be helpful for bench testing, but your powerbook is intended to run with a battery in place. Without a battery, it may be more likely to sustain damage due to power fluctuations. If the main battery does not recharge itself, it may be dead and require replacement.
The PowerBook also has a recharging PRAM backup battery (unlike the iBook which has only the main battery). You may have to leave it plugged in overnight (without the main battery in place) or longer before it has any hope of recharging the PRAM backup battery. If the PRAM backup battery does not recharge, it may be dead. It is more convenient to have a working PRAM battery for daily use.

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