Help Needed - Possible Powersupply Problem

lance_biscuit · 13 Jul 2008 at 18:27

The other day I installed a fresh copy of xp, ever since the computer would turn itself off pretty much whenever it feels like it, even when trying to reinstall xp. I think it could be a power supply problem, i've got the crosair 850w? Any ideas on how I would establish if its this other than trying to use an alternative psu?

Any help greatly appreciated!

Cheers

lance_biscuit · 13 Jul 2008 at 18:46

Was just thinking of checking around the bios, but now the pc refuses to boot and when it does it just turns off again, if i press the power button the fans start to pin a little and then stop. its like its cutting out for safety, would you think psu then?

lance_biscuit · 13 Jul 2008 at 19:07

Hi Zinc, yeah I think it must be the psu now, its not even letting me start it and when it was rebooting it wasn't giving me any errors when i disabled the automatic restart, so not a driver issue, what a pain now, got to package this up and send it back!

lance_biscuit · 13 Jul 2008 at 20:08

Mines a Asus P5K, I've just done a test on the psu though, by touching two pins together as per crosairs website support, and it barely turns the 120m fan thats in my antec p180, so that would indicate to me that its the psu faulty, it didn't have enough puff to drive it around. So im gonna rma it personally.

lance_biscuit · 14 Jul 2008 at 18:13

Just left the pc for the day while at work, came back and retried the psu test, it passed this time, started up the pc, into windows setup and then waiting for it to load that up and it turned off again, would it be the motherboard?

Never had any issues with mbs tbh, and have plenty of brands, dfi, sparkle, gigabyte and previous asus's. If it is the mb, I'll be livid, got all the wiring sorta decent in the rig!

Whats asus's return procedure like?

Cheers

lance_biscuit · 15 Jul 2008 at 09:10

Thing is that the mb shows the green light indicating that its getting power, and i've only managed to get the fan to spin up by the green and a black pin on one of the black pins, but I think thats just due to the fact that its hard to get a contact.

The system doesn't even boot at all now, I tried resetting the rtc (cmos) to see if it had something to do with that but that was a no go aswell.

Do i have to return the board to asus or does overclockers handle it? I've had it for a few months now!

lance_biscuit · 15 Jul 2008 at 16:05

I think you misread that last post mate, I'm assuming its the motherboard because the fan is spinning up when I do the green and a black pin test. I've no other basis to work off, other than possibly buying some sort of psu testing equipment.

I will give a dmm a try though, could be handy!

lance_biscuit · 15 Jul 2008 at 23:16

As suggested i got a dmm tonight, checked all the leads off the main lead 20/24pin lead and some of the molex, everything seems fine with the psu, even getting 12v and 5v bang on on each. Its crazy, so is the general concensus now motherboard?

lance_biscuit · 16 Jul 2008 at 08:47

Yeah I've tried the psu in the system with only the mb, gfx card and a hard drive connected and once without the hard drive too. I get nothing at all from it. I unfortunately don't have another mb to test it along with as I passed on my old hardware to other people.