New System, 8800 does not work, PC does not work, please help.

For some bizarre reason, my previous post a few days back seems to be deleted, so I'll start again.

Over christmas, I bought:

1 AM2 Gigabyte S series motherboard
2 1GB OCZ memory chips
1 AMD Athlon XP 64 2.9GHz dual-core processor
1 Seagate (I think) 500Gb hard drive (SATA)
and 1 X-Power 750W PSU

and already had:

1 XFX 8800 Ultra graphics processor
1 SBPCI128 sound card

I put all these together, and find that, whenever I turn it on, it gives no signal to the monitor, and does not make a single beep. Strangely, the fans turn on properly, the drives look like they're working (all the right lights come on), and yet... no beep, no signal. Can somebody please help me here?

Solutions that have been suggested in the previous (deleted, for some reason) thread:
- Taking out the MoBo battery for half an hour, then reinserting and restarting (it turned on, turned itself off, then went back to the previously described pattern)

I am currently at my wits end (as I need to do my university work and work on my digital art), so can someone please suggest a solution (preferably not one that ends with me getting a new MoBo and processor, because, being a student, I am skint) and not delete this thread.

Thanks muchly,
Darkwolf

Check your CPU heatsink. I had a similar issue, on my stock Intel cooler. It has 4 plastic "push pins" They expand out and "lock" under the MB when you push on the connector. Well... one push pin expanded above the MB, so basically one corner of the CPU was raised, keeping the heatsink above the CPU, even though the other 3 pins were push in fully and locked in.

The CPU overheated so fast that it would barely POST. I was getting farther than it sounds for you though.

Do you have onboard graphics? Try skipping the graphics card and sound card. Just go basic MB/CPU/HD/RAM and onboard graphics if you can, see what that shows.

If every thing is all "plugged in" cleanly, I'd suspect MB first, and the PS second, CPU last.