Ive done all the normal testing, resetting bios, 1 ram stick at a time, and heres what happens, I shut down my computer just fine the other night had no problems. woke up to turn it on, powered on but no video beep and no post. did a hard restart with power supply since its done this in the past. Now it stays on for 5 secs then reboots itself, no post still nothing. on 5 secs reboots ect indefinately. Now heres what i did notice, the CPU fan was inop so i replaced it with a working one new heatsink ect. still the same problem, tried a new ps, same issue. so back to orginal ps and new cpu fan/sink I unplugged the 4 pin 12v power supply connector and now the power stays on no post ect but it doesnt reboot itself. I tested the voltage and ground and they are correct within the power supply. So the main question is, Which is likely failed the MB or the CPU?
Specs: MB - Gigabyte GA-G33M-S2L
Intel E6600 Duo core ect
rosewill power supply, 550W
I've never had a cpu fail unless it overheated. If your heatsink was always making good contact and the fan turning, I would favor the motherboard failing over the cpu. And Rosewill isn't the greatest power supply. If you replace the motherboard, I suggest a better brand of ps. I use antec, but ocz and corsair are also good.
It sounds like a motherboard failure, possibly a voltage spike that damaged a capacitor, or voltage regulator. Rosewill PSU's are not the greatest to base a build around. If you are going to go cheap, go cheap on the Case and RAM. Always get a good quality PSU from any of the following: Antec, OCZ, PC P&C, Zalman, Corsair, BFG, Seasonic, or even Thermaltake.
rosewill PSU's are unstable at best, but as far as the question at hand, i would say it is likely the motherboard and not the CPU. As stated above, if you plan on getting another MoBo, get a decent 500+ watt Corsair or PC Power & cooling PSU, it'll last forever and they are solid.
Alright ill give it a shot when i get home, the machines over a year old so its been due, its been decent except for the cruicial ballistix ram that failed early on, I'll look into getting a better psu and MB
well swapped out mb's and the same effect, could a bad cpu cause reboots without any kind of beeping or any kind of video at all? Im stuck for now, i can try my cpu in a buddies machine which is a mirror of mine to see if the problem traces if not I dunno where to go with it.