Computer shuts off/will not turn on

[drmatt2020]

I put together a new system a few weeks ago, and it has been running somewhat smoothly. However, today I found the computer off even though the power had not gone out. I booted it up, and shortly after it simply turned off (not shut down). When I tried to turn it back on, everything came on for less than a second and shut off. My first thought was power supply. I unhooked everything but the essentials, but it still would not come on. I tried a different power supply with the same result. It eventually turned on. I started hooking things up slowly and checking. It kept turning on for a while and then started the whole thing over again. I disconnected everything one more time, but it will not turn back on. After waiting a while it turned on, but turned off after I went into bios and then exited. The cpu temp was at 43 C, so that's not overheating. The power supply is an antec 550 watt and is less than 6 months old. Could it be the motherboard (only about 3 weeks old. DFI Lan Party)?

 

[turtile]

Did you check the motherboard tempature?

 

[RicoDirenzo]

Look at the components lastly....check out the power supply first. If you have another power supply laying around put that in or can swap one out with a friends puter you might find that that is the culprit right up front!

 

[drmatt2020]

Is there a motherboard temperature monitor? Under PC Health it has cpu temp (about 43 C), system inside and system out (both about 30 C).

 

[drmatt2020]

I tried a different power supply with the same result.

It's not the power supply.

 

[macdude425]

Well, it sounds like a CPU problem, but if it were the CPU, it would be consistent. Go thru and check everything else you can, as said above.

 

[drmatt2020]

What's to check? It does the same thing with only the basics hooked up, and I've swapped out the power supply, but it didn't fix it.