Help! PC stuck in powering up and down loop!

mcgriffo · 12 Oct 2008 at 23:34

Here is the problem - when I press the power button to boot up my PC, it starts to boot but powers down before getting to POST. It then powers back on automatically before again powering down before POST and continues to do this until I kill the power at the back. I have tried it with a new PSU and it does the same thing so it isn't that.

I'm running an E6600 on a P5B Deluxe WiFi board.

Oh - and I've also left it for a night with the CMOS battery out and the CPU detached from the board, but when I reinstalled it was the same story.

Any ideas anyone?

BENdage · 12 Oct 2008 at 23:40

dead board I suspect, although its not a problem I've seen or heard of before. Do you have another mobo you can test with?

mcgriffo · 12 Oct 2008 at 23:48

Nope, it's the only board I have... it was working fine before (at stock). I suspect this was caused by my overclock as I was running orthos when it first powered down. Didn't think it would be a major problem though as I was doing 3.6ghz, watercooled, and only hitting about 52c on the CPU (1.45v)

FSB was at 400 (1:1) so the RAM was just at 800 (ok for my OCZ DDR2)

Which MOBO chip could have blown if this was the case? And how come if I wasn't pushing anything to mad extremes?

mcgriffo · 13 Oct 2008 at 09:21

So is the general consensus that I will need a new board?

Will the Asus P5Q Pro be ok with an E6600, an 8800 GTS and the Apogee waterblock I was using for the E6600 on the P5B?

Anything else I need to consider?

rjk · 13 Oct 2008 at 10:16

my mates old one did that sometimes

clear cmos on the jumpers and it worked

if you are looking at a new board

any p5q board will do you well
just decide what features you will need

[tbh i only had the p5qe because i liked the heatsinks better then the vanilla one]

mcgriffo · 13 Oct 2008 at 10:35

Thx - so clearing using the jumpers will have a different effect than taking out the battery and reinserting it?

mcgriffo · 13 Oct 2008 at 15:09

I also forgot to mention - think I was in denial - that the first time it powered down (under orthos) I was convinced I could smell a faint burny sort of odour in the air... I KNOW this doesn't sound like good news, but is there still hope?

Once again, I hasten to add that nothing was being pushed to really extreme levels (see above) and temps were only just over 50c.

PaulyD · 13 Oct 2008 at 17:02

Really need to test processor in another board

pastymuncher · 14 Oct 2008 at 11:50

What is the psu? Maybe the extra strain has induced a fault in the psu. I had one fail and do exactly the same as yours is doing.

PaulyD · 14 Oct 2008 at 12:15

He has tried a new PSU in there

pastymuncher · 14 Oct 2008 at 15:17

PaulyD said:
He has tried a new PSU in there

Missed that.

misterPK · 14 Oct 2008 at 15:52

Have you done the obvious of checking its not the switch on your case? Have you tried taking the motherboard out and setting it all up on your desk then shorting together the power on pins with a screwdriver?

PK!

porta · 14 Oct 2008 at 16:05

hi, I have had 2 asus boards do that.

rampage formula, benching a [email protected] board just turned off.
On restarting just got the powering up down and up again, had to rma that one.

maximus formula se. that one did it every time I changed a cpu, no amount of clearing cmos e.t.c would make any difference.

But taking the cpu out and putting it back in again 4 or five times and it ran again. :confused:

A sucker for asus boards tho, just got the rampage extreme.