Ive tried booting in safe mode, it doesnt work.

I also tried inserting my xp cd but I get this errror

stop: 0x0000007E (0xC0000005,0xf786B0BF, 0xF7CB7208, 0xf7cb6f08)
Pci.sys - address f786b0bf base at f7864000, Datestamp 3b7d855c

Power off and unplug PC. Press/hold ON/OFF botton for ~15 sec. Open the case and reseat the RAM modules in their slots. Even if you didn't remove them while you were replaced the PSU, it's possible they got bumped and aren't seated correctly.

If that doesn't do it, remove all but the RAM module in first slot (might be labeled slot 0 or slot 1). If it still won't boot, swap that module with each of the others, one at a time. Possible you damaged one of them or there was a stattic discharge that fried a RAM module.

Ron

Well I guess I must have ruined the ram because I get the same error continuously.
A few other times because I would get the disk to work but it would tell me the there was no hard drive even though I have it plugged in and set in the bios.

I guess I must be the unluckiest person in the world and should have known better after my experience with my 8200.

try running diagnostics. press F2 on the Dell logo. when it gives you the boot option. choose boot to utility partition.

run express test. that should give you an idea on whats causing the problem in case its a faulty hardware.

also,

try to disconnect external peripherals. like printer or any device conencted to usb except mouse and keyboard.

oh regarding the harddrive that cant be detected during setup. it could also be that you have a raid SATA drive. you might need to reinstall the harddrive driver. call techsupport for assistance

Message Edited by c0tt0n_CaNdy on 08-14-200612:47 AM

I did the express test and it says everything works fine.
Currently on hold for 10 minutes and hoping my warranty will cover this :P

Does your XP installation CD have SP2 in it?  If not make a slipstreamed CD and it should work then.
This means you use your present XP CD and incorporate SP2 into it so that it becomes an XP SP2 installation CD.

Here is how to do it.  It is not difficult
http://www.winsupersite.com/showcase/windowsxp_sp2_slipstream.asp

Thank you for all the help, my computer is working fine now :)

And the fix was...?

Ron