Help diagnosing motherboard issues

[an51r]

Hey all,

I had a msi p7n platinum 750i and it passed away, powers on but no video the basic death, and I bought a msi neo3 p45 for replacement until my rma was completed. I installed the board today hastily and ended up running a fan cable in between the heatsink and cpu, doh, and ran it three times til it shut off . These were short periods as it did not even get to boot before shutdown, I then comcluded it would be heat that would cause it to shutdown like that and noticed the wire.

Now upon seating the heatsink correctly the board powers on for a few seconds then off and on, off and on, it will not stop cycling until I unplug or turn off the psu. It is not shorting as I have it out on an antistatic bag with only the bare mininum installed, vid card, one stick of ram and the cpu/heatsink.

Do you think the motherboard or cpu is dead? I verified the psu on another PC. I have had many motherboards but never like this. I have never killed a cpu before so wouldn't know if this is common with a dead cpu.

 

[M1A]

Are you using all the other items from the last system that the MB died. If so I bet one of then went down when the board died or the MB was not the original problem. Maybe try another CPU if you can. Also double check all the bios settings are correct. The cpu's are thermally protected so short periods with cooler problems should be fine.

 

[AsusGuy]

Have you tried resetting the CMOS? I would also try some different RAM if you have some and use different configurations. Sounds like a short problem.