1805 freezes/does not power on

I have a Toshiba Satellite 1805-S204. It freezes shortly after being powered on; sometimes it'll freeze before the OS can boot up, other times it will run for awhile before freezing (anywhere from ten-twenty minutes for hours). It doesn't appear to be a CPU heat issue, as I've watched the temperature (with SpeedFan) go up and down normally, usually staying around 115F/46C while idling and 144F/63C. I can usually make it freeze simply by moving it; even if I gently pick it up or set it down, it freezes. I've tried two separate hard drives. I've stripped down the system to the bare minimum it needs to boot (system board/CPU/RAM, HD, and CD) and it still freezes. Usually, after freezing, it refuses to turn on. The lights will come on after hitting the power button, but nothing happens; the screen doesn't turn on, the hard drive doesn't spin up, and the fan doesn't spin.

Any ideas? I've tested the memory and spread the existing thermal compound on the CPU.

 

Send it in for repair. It might be a defective systemboard or power supply board (if it has one). It's possible there's a short somewhere which is causing it to fail. Looking at the model, it's probably out of warranty. If that's the case, I'd sent the unit in to find out exactly what's wrong and for a quote. If it's too much, then you can goto ebay and by the part & repair yourself or just buy a new notebook.

-Vb-