PC powers on for 1 sec

Nikolic · 6 Jan 2011 at 20:26

Hey guys,

Basically my machine powers on for about 1 sec, all the fans spin up.... then it shuts down.... starts again in 2-3 seconds for a 1 second... then shuts down again.

My initial thoughts were that it might be a power supply problem? The trouble is I don't have another power supply to test it with.

PC Specs are:
Asus P7P55D Pro
Intel i5 750
Be Quiet! Straight Power 650W
ATi HD 5850 1GB
OCZ Gold Low Voltage 2 x 2GB DDR3

I've got an old AMD64 system that I might be able to test the power supply on, but I wont be able to use its power supply on the Intel system.

Had the system about 15 months by the way.

Thanks for all your help in advice.

thecomputerguy · 6 Jan 2011 at 20:29

try psu in another system
could be shorting out somewhere
or could be a mobo fault
reset cmos

4T5 · 6 Jan 2011 at 20:31

Take the Bios battery out for 33 seconds replace & then try it.

RJC · 6 Jan 2011 at 20:36

Try one memory module at a time.

Nikolic · 6 Jan 2011 at 20:38

4T5 said:
Take the Bios battery out for 33 seconds replace & then try it.

Just tried this, did not work.

I will have to get my AMD system out and try this power supply on it tomorrow.

Will try the memory thing - but I thought it would still at least power on with a RAM problem right?

scubes · 6 Jan 2011 at 20:38

Check all your cables especially the CPU one.

Nikolic · 6 Jan 2011 at 20:41

Tried the RAM thing - still not working.

I've checked all the power cables already. All seem fine.

thecomputerguy · 6 Jan 2011 at 20:44

its either the psu or motherboard

i would say 99% motherboard fault

Greavesy · 6 Jan 2011 at 20:47

Sounds identical to what haooened to my sisters old PC and my dad has a techy out who said the motherboard capacitors had broken.

Nikolic · 6 Jan 2011 at 20:50

If it was the motherboard, who would I have to contact to get it replaced? It was bought from here in Oct 2009. Would I have to contact Asus or OcUK?

scubes · 6 Jan 2011 at 20:51

Is the motherboard still under warrenty?Rma it.

thecomputerguy · 6 Jan 2011 at 20:51

try OCUK first see if they will raise an RMA for you

RJC · 6 Jan 2011 at 20:54

Post a note in the customer forum once your sure it may be the board, Ocuk will probably test it as well.

LiamJ · 6 Jan 2011 at 20:57

Nobody else think this sounds like a PSU problem? It certainly could be a motherboard problem though.

Only tests will reveal the answers I suppose.

FWIW, I've never seen BeQuiet! as a reputable PSU company. Always been quite low end in my mind, as regards to component quality, actual output etc. I might see if I can find a review.

Okay, statement taken back. Reviews seem favourable, and no major issues. I suppose it could be getting a little old though. How old is it?

Nikolic · 6 Jan 2011 at 21:11

The PSU is the same age as the rest of the system - was bought in Oct 2009.

I've just taken the PSU out of the system and will try it on my AMD64 system tonight or tomorrow.

Faztastic · 6 Jan 2011 at 21:50

i have same motherboard, had same problem after an overclock.

turn it on and click the built in mem ok button.

Worked a treat

strumpusplunket · 6 Jan 2011 at 21:54

I'd put my money on PSU. Have you got a PSU tester? Remember if your AMD64 system has lower power draw on startup, it may power that okay. I'd try to test your PSU with a tester or in a similar system, or try another PSU with your failing system.

Nikolic · 6 Jan 2011 at 22:09

Faztastic said:
i have same motherboard, had same problem after an overclock.

turn it on and click the built in mem ok button.

Worked a treat

Tried that, didn't work.

Just tested the PSU on my AMD64 system and it seems to be working fine. Guess it's a motherboard problem then.

Thanks for your help guys.

thecomputerguy · 6 Jan 2011 at 22:12

start an RMA off m8

Mike223 · 6 Jan 2011 at 22:43

Happened to me the other week and it was the cpu cooler that was inserted correctly.