Macbook power issue

A few months ago my room mate spilled water on my black macbook (not sure of the specs I got it in summer of 06). Anyway, I decided to mess with it today and try to get it working and it actually booted up...for 10 minutes, then it shut off and will not turn on again.

It went back to doing the same thing it used to, it'll flick a grey screen once when trying to power on, then it will show the loading screen for about 3 seconds then the screen goes completely blank and the front sleep light starts to go on. This only happens if it's plugged in, no battery power even with a new battery.

When I went to the apple store they said it was the inverter, another non apple store said it was the logic board and would cost $1000, but considering it started up and was fully functional for 10 minutes it's not the logic board (I've since replaced it with a newer macbook). I am fully capable of replacing the inverter but wanted to get your guys opinion on it. I've already done the obvious like reset the SMC and PRAM, and pulled out the ram and reinserted it.

Thanks,
Matt