Okay, the computer was/is an old HP Pavilian 8565C, motherboard is an ASUS P2b-VT, and, after a long couple months of it not working, last night I foundout the PSU was bad... trying a new PSU i got it to work, needed to move it to a new case that supported the PSU (didn't fit in the old case) during the move, something must've happened, as it now won't POST, or show any signs that it's getting power... my question: if the bios are corrupt, would there be an error message/beep/large sign or similar? or is it truthfully hit or miss as to whether it's PSU, or CMOS/BIOS? If it is CMOS/BIOS, would removing Battery overnight clear them? (I can't quite manage to short the two points for clearing RTC... never did like those short soldered points...)

If the PSU wouldnt fit the case its odds on that it is not compatible with the mobo but thats to be proven. when you reconnected the motherboard power did you put the 20 pin connecter the right way around. They are designed to go only oneway but they can be fitted end for end assuming that it is an ATX machine. Did you have the ram out? Did you put it back in properly? If you didnt pull too many pieces off unnecessarily and you didnt waste time and forget things then the answer will be simple and straight forward as corrupting a BIOS takes a lot more effort than moving a mobo to a different case.

This is a common error when changing motherboard/case. Reseat CPU and RAM Make sure all the cables are connected properly. I think that will fix your problem! Robert

the mother board could be shorting out on the case.

I was going to say mobo sortingout too. I had the same thing with a bad p/s, with one of those f*^%&*king hp comps, god I hate them. They design the case where you plug the wall plug cord into so you can only fit in another exact 177 watt or something p/s, which you can easily buy for like $100. Losers. Not sure if this helps, as it sounds as though you've already purchased another case, but I have just in the past cut the case to fit the power supply, as it usually just doesn't line up with the cord for the wall, correct? It's very easy to do, just make sure you disconnect that piece of the case (on that model I'm preety sure you can just remove it), or remove all the innards' first befoer cutting. Hope that helps.

Thanks for the input, gonna check it when I get home... (a bit more information: the new PSU is designed for use with a P4 (has the 4 pin connector), and also has the 20pin ATX connector (as did the last PSU, i assumed they were compatible when it booted up while the new PSU was hooked up and sitting on the outside of the case :) ) both PSU's had a clip on one side, both fit pretty much perfectly, not requiring much force (near idiot proof... YAY!!!) in short, I pulled out everything, about 3 PCI cards, an AGP card, the Slot 1 P3, Ide Cables, Power Switches, LEDS, and Ram... will try reseating proc an ram when I get home... just wish someone made getting the P3 out of slot a bit easier... (Though one positive about slot 1 proccies that I've noticed... the heatsink is idiot proof as far as installing... tis amazingly simple) a quick q, would there be any sign that the motherboard is shorting out? (example, would the case conduct a current, PSU fans spin up), sadly, I've accidentally stripped a screw on a rather cheap case, so the board won't come out easily if that were to be it... and... yes... HP PSU design is quite... idiotic? if it does end up being a short (and I can pry the motherboard out), I'll take that advise (the CD and floppy cage's for the HP case are quite easy to use... ohh well) Thank's fella's!!!

Alright... found out the problem... came home reseated proc and mem... several times... finally decided to test it with a New PSU/one i know to be working... and, that's it... the semi-new PSU's dead... (funeral will be held on monday), which I suppose isn't impossible (it hadn't been used for more then a few months when I got to it... suppose it just went out like the HP PSU), now, a question... how much power does a Slot-1 P3 with fan/heatsink, upto 2 extra fans, 2 cd-rw drives, 1 harddrive, 1 floppy drive, and about 2 USB devices need? (I know there's a calculator somewhere, but as I'm on dialup, downloading something at the momment, don't have bandwidth to find it)