Hey,

So, I have a desktop that I built myself about a year ago. It was working just fine until summer when I tried to move it into a new case (dumb idea). I moved all the parts over being careful not to short anything. Anyways, as soon as it was done I booted up and normal functions worked just fine (internet, word, etc) but when I would try to play any games (specifically minecraft) the computer would run for 15 minutes or so and completely lose all power. There was no error message, just simply loss of power. After trying a whole bunch of things, including 2 new power supplies of different larger voltages (no success), trying new RAM, and taking out my video card and using the onboard mobo video processing, I came to the conclusion that it was the motherboard. So, a few weeks ago I sent that back to the manufacturer (everything is under warranty) and got it replaced. Today I reinstalled everything with the new motherboard and went to finally use the computer. Except now when I press the power button the computer starts for a split second and then completely turns off. I have tried a few different power supplies and no success. I'm just wondering if anyone has any experience with something like this, or if I just need to take it in somewhere. I'm really confused what could be wrong.

The COMPONENTS are:
Intel H55 Micro ATX Motherboard
GeForce GTS 250 Video Card
Intel i5 Dual-Core Clarkdale CPU
Ripjaw 4GB (2 sticks) RAM
Hitatchi Deskstar 1 TB Hardrive
Blu-Ray drive

Any help would be greatly appreciated.Might be a weak CMOS battery. Replace or reinsert after a couple of minutes. Diagnosing this type of behavior could be something else but you could start simply from the battery. When you moved everything, did you REMOVED the processor and/or CPU fan? If so, did you reapply thermal past before putting it back together. It's possible it is overheating.

Depending on the condition of the transfer between the processor and the CPU fan's heatsink, the computer can overheat in as LITTLE as 5-10 seconds from powering on and automatically shut off. Sometimes it won't overheat until you actually apply some load to the processor, such as you were having an issue with before.I tried the CMOS thing, took it out and put it back in - nothing. I don't have another to try right now, but I could get one tomorrow. I didn't reapply paste, didn't even think of it. You think it could overheat that QUICKLY? Right now it's starting for literally a second, right after I press the power button it dies. Another thing to note is that after it does that I press the power button again it won't start but if i unplug it and plug it back in it will do that same start and die thing before not starting again.

The protection from thermal events is caused by auto shutdown. You need another battery. Use also first onboard video and a stick of RAM alternately. Make sure the Heatsink and processor are locked properly.Whether or not it's the issue, you might want to reapply thermal paste. Clean off the old paste from the processor and COOLER and reapply. This will at least eliminate that as a possible culprit. Best to clean it off with just a bit of rubbing alcohol applied to a cloth.

Depending on the conditions, it doesn't take long to reach a shutdown temperature. I've worked on computers that didn't have thermal paste applied or the the paste "seal" was broken by removing the cooler from the CPU. Like I said, depending on the system, this can cause it to overheat when a decent load is applied, or in some cases in a few seconds from boot.

From what you're saying, where it's shutting down within a second of booting now, this might not be the case but at least we can eliminate this possibility.Ok, so progress. I did the thermal paste thing and the computer started. Now, I have the issue that I'm not getting pictures on my monitors. I have a 2 screens and it was set to multiple monitors until I had this issue. Any suggestions?So the computer is staying on now after applying paste?

If it is, disconnect one of the monitors, reseat everything and make sure each goes in firmly, check all the power cable connection and fan connections and make sure they're connected properly.