its sounds like a loose connection. if you got any warranty, send it in. if you got a few bucks, take it to a computer shop, or a PC repair place. if you want, you can disassemble your 'top and look at the connections itself. check out these disassembly steps here. you might be able to skip to step 5.
Yeah, it's beginning to look like i'm gonna have to get it repaired.
Until then I have it plugged into my psp and using psp disp, but my psp's screen is also broken so i have that plugged into my tv XD
I suck with technology...