System won't boot.past ACPI controller IRQ allocation

[Quagmire02]

I just reinstalled Windows on my PC and after reinstalling and restarting, it wont boot. It starts going through post and detecting devices in the system, but stops after allocating IRQs on the ACPI controller line and a flashing cursor is displayed under the ACPI controller line (no data for the controller comes up like previous IRQs).

I cannot even get as far rebooting from my XP disc. I removed ALL my PCI devices except for my video card (pci-e) and get the same thing.

Also tried:

Resetting CMOS
Reseating memory
Reseating video card

I'm sure you smart ppl know the answer!

 

[Quagmire02]

sorry, here's my rig

Asus A8N SLI mobo
1gb Mushkin memory (2x512)
Athalon 64 3000+ Cpu
Antec 500W SP PSU
evga 6600GT gpu
m-audio sound card
d-link wireless pci card
maxtor diamondmax ide 250 gb hard drive
plextore 712sa sata dvd burner

 

[vanilla_guerilla]

i had a bad maxtor drive once that caused the same prob and drove me insane. i swapped psu's, rma'd mainboard, still had prob. all i can tell you is try swapping out your psu, and disconnect everything except cpu, 1 stick ram, vid card and hd. if possible, try another hd.
good luck.