Can anyone help me ressurrect my Macbook Pro?

So last night after a little surfing on my MBP (non-unibody, mid 2008 model), I leave my room and it is fine. I come back a little later, and it does not respond when I try to wake it up from sleep mode.

I power it off, but it won’t even boot. I press the button down, and I can hear the CD drive and hard drive come to life and the LED comes on, but a second later it kicks back off, before the screen can even turn on.

I initially thought it was a stick of RAM that went bad. About 2 weeks ago I got new RAM (2×2GB) for it, but it wouldn’t boot with both 2GB sticks in, so I’ve been using it with one factory 1 GB stick, and one new 2 GB stick. I popped out the old stick and put both factory sticks in, but no luck there.

Since it can’t even boot, I can’t get it into safe mode or try to boot from the disk to see if it is my hard drive that is the problem.

I’m utterly perplexed at what to do next. I’ve tried turning it on with just the battery in, just the wall charger, and both. No dice.