Sheekster

Thanks for the help Ken, it was much appreciated.

No real level of dust. My case has a psu inlet with filter mesh which is quite good

I've taken my motherboard out of my case and took it round a friends. We put 24 pin power and 8 pin power keyboard and ram. It POST first time and stayed on for 10 minutes. After that we removed power as that was proof enough for us I have come home left motherboard out of case and put same cables in. Test failed. Post the first time stayed on for a minute now in a continuous loop. That has to prove it's my PSU even though the measured voltages were good? Which I am so happy with as it the cheapest thing to replace! Dust in the psu? I havnt checked!

8 pin tax was 12.37 v Molex red 5.13 Moles yellow 12.19

Ok will do Cheers

When it does manage to boot the CPU temp is around 39 I live in Cyprus and the room temp is around 30

I am going to get a multimeter from work and do the test suggested on the link you posted Cheers

Thanks for the welcome. All cards are stripped and hdd My confusion lies in the fact that if I remove power completely and reapply, the POST works and boots to bios( this is because hdd is removed) after a few minutes it will restart all by itself, it will then just be continually power looping Confused

I have a asus p8z68 motherboard with i5 2500 k CPU. It has been working solid for around 5 months. This morning I come find it in a power loop. I have read forums and took advice such as -reset CMOS -reseated CPU and applied new thermal paste - removed graphics card, all USB apart from keyboard, hard drive and optical drive. - reseated tax cables I find that if I unplug the main cable from my psu it will boot and pass post, after roughly a minute it will reset then go into an infinite loop? Is this a broken psu. Cheers for the help guys