Help with starting up G3 that won't power up

Hello,
I have a powerbook G3 500mhz firewire with the first OSX version that I'm trying to get started up. It was working fine a few months ago (the last time I used it). Not it won't start up at all, no sounds or anything, even when plugged in. I'm sure there hasn't been any damage to it as it's been sitting on my desk in the same position since the last time I used it.
I remember this happening years ago, and I was told to leave it plugged in for a few days for one of the batteries to recharge, and that fixed it that time. This time I left it plugged in for a week but still no progress.
Any ideas?
thanks.

ble,
If I just may add to Tom's reply. IFixit's instructions are great, but they don't show you the quickest and simplest way to the hardware, often having you remove parts unnecessarily.
All you need to do to access the PRAM battery is this:
-Remove all power.
-Remove the optical drive from the bay.
-Support the back of the powerbook display so the 'book does not tilt backwards.
-Lift off the keyboard but do NOT disconnect the keyboard; just lay it face down on the palm rest.
-In the picture, you can see the white connector from the batteries to the logic board. Use needlenose plies to pull it up if necessary.
-Now without any reassembly, connect the power adapter and start. If successful, press/hold the power button until the Pismo shuts off.
-Reconnect the PRAM battery and again try starting. If successful, shut down and reassemble. If it won't start, unplug the PRAM battery and reassemble.
If the 'book fails to start after reconnecting the battery, it probably has an internal short and needs to be replaced. Your Pismo will run fine without this battery connected.
Message was edited by: jpl

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