Computer Booting Problem

[cree]

Well here it goes, I went to install another harddrive to backup stuff from my current harddrive before I reformat. The install went fine and everything until I booted it up.

It said it wasnt detecting any of my drives at all. I pushed the eject button on the cd drive to see if there was power and there wasnt. I unplugged the cd drive and other harddrive to see if it would just boot my old harddrive in which it didn't.

So I unplugged all the power connector thingies and plugged them all back in. Now my computer wont boot and I cant get anything to come up on my screen. I dont know what is wrong since I havent touched the video card.

Specs:
AMD 3200+
Gigabyte K8-N8NS Pro
Geforce 6800GT
Corsair PC-3200 512x2
WD200gig trying to connect WD80gig
and if it matters, 520watt Aspire powersupply (yes its on 115v)

and Thanks

 

[Trotter]

If it's not detecting the drives, I'd check the data cables- unplug and replug them.

Also, check ALL of your power connections to make sure you didn't wiggle something else loose while you were messing around in there.

 

[Blue_Nine]

Could also be a dodgy PSU. Can you hear the PSU fan spin-up?