Dead motherboard

[neit]

I bought a msi-p55-gd65 about 2 months back and after about 3 weeks
it died. I sent it aback to overclockers and they replaced it with msi-p5-gd80.
I fitted the new replacement board on the 23/2/10 and it worked fine for the
past 5 days. I turned the system of this morning and when I went to turn it
back on this morning it will not power up. The symptoms are exactly the
same as the previous one. I have connected the power supply to 2 further
systems with p4 processor and they power on.
I have also disconnected the video card, ram, hdd, dvd drive and fans but
still no signs of life. Power supply i am currently using is a hx750 and I have also connected a tx450 to it but no power on.

Could I have just been unlucky and got another fault board or could something else be causing the issue.

System specs:

MSI P55-gd80
cooler master scout case.
xfx hd 4890 video card
4 gig ozc pc312800 ram
i5 processor
samsung spinpoint f1 hdd
samsung dvd drive
corsair hx750 pwer supply

 

[RJC]

Only few things I can suggest is try with memory module and do a CMOS reset, also try external to the case.

Other fan that you may need to send this one back.

 

[IKMS]

also try external to the case.

Bench test may help. It helped me.

i was going to RMA my Motherboard but I did a bench test and realised my PSu had stopped working. Would have cost me a lot to have it RMAd.

Also, check you aren't shorting the motherboard every time you boot, that is what I was doing

 

[neit]

Also, check you aren't shorting the motherboard every time you boot

how would I check for that

 

[neit]

Tired with 1 memory module issue persists.
Removed cmos battery for about 15 minutes put it back in issue persists
tried external from case issue persists