problems booting, crash during bios

[superlyduper]

So I physically moved my computer about 3 feet, heard some screws rattling around (happens all the time, there are some loose screws inside the case), and tried to boot anyway. I get to the bios splash screen (it says hp, and has option for boot menu, setup, etc). If I press fast enough, if I press the key for one of the options, it will say "loading boot menu", or "loading setup", but it will stay like that forever. If I don't press a key for one of the options right away, nothing happens when I press a key later on. I've tried both onboard graphics and my nvidia card, i've swapped out the ram for ram I know is good, i've tried booting with just cd and with just hd (my data is still intact, whew...), i've reseated the cpu/heatsink (although unfortunately I don't have access to another cpu). i've tried using the jumper to clear the bios/cmos settings, to no avail. I've looked a bit through the manual, but haven't found anything interesting..

Here is my equipment
MSI-7903 (ATI S480M2-IL) I ripped from a HP computer
athlon 64 3500+
geforce 7600gs
alot of ddr1


Is there anything else I can do? What might be the problem?

 

[troisanh]

Why not take the time to remove things to find out what screws/bolts are loose and correct them?

Probably something shorted.

 

[superlyduper]

i've taken the mobo out, put it on top of an antistatic bag, and tried to run it again, but no luck
could something have been shorted if power was not on?