Computer turning on then off right after

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bdk98

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Jun 18, 2013
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Hi, me and my friend are trying to troubleshoot his computer. He had bought a new case and PSU for his system. Hes running a GTX 670 with an older Acer IPISB-VR Rev. 1.01 (Hope that's the model number, its under the Acer Inc. logo) motherboard. He has an Intel i5 processor with 8 GB of RAM. I'm not quite sure the make of the PSU (I believe its corsair but I am not currently with him to check). Basically, we spent about 2 hours trying to find the pinout diagram for his motherboard`s front panel connectors. We found it. But, upon pushing the power button, the computer starts, all lights, fans, start spinning, HDD starts initiating, disk drive spins, then everything just hard-stops (by that I mean everything stops on an instant). All in about 2 seconds.

We've taken everything out minus the indicator lights on the case (motherboard has no way of telling us its running other than the CPU fan spinning), just the PSU and mobo, we've even tried without any RAM whatsoever to possibly hear that beeping that everyone hates out of their PC, but, still the same starting and instantly stopping. I believe he's going to try his old PSU but its currently stuck in the old case apparently and he has to get it out. What do you guys recommend doing? Is it the mobo? the PSU? The motherboard worked fine with his old stuff before he had moved everything to his new case. The GPU was working fine, everything fine, until he had moved it all.

Please help us, we've been kneeling over the PC for 16+ hours now...
 
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Hello bdk98!

I was just searching through the forms and spotted your problem. I just joined and may be of some service!

I had a similar problem this weekend installing an older motherboard into a new case. I re installed everything exactly the way it came out right down to the last led hooked it up and nothing! It never made a sound and the led on the board was active so I was perplexed to say the least.

I moved the case around double checking all the connections to the mobo, drives, psu all good to go and still nothing. As I became a little frustrated I must have twisted the case (sides weren't attached) and I poked the power button...Life!! I was happy and remained online and testing for 3 hrs had a few beers and went to bed. My gf...
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Speeddemon3

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Aug 6, 2013
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Hello bdk98!

I was just searching through the forms and spotted your problem. I just joined and may be of some service!

I had a similar problem this weekend installing an older motherboard into a new case. I re installed everything exactly the way it came out right down to the last led hooked it up and nothing! It never made a sound and the led on the board was active so I was perplexed to say the least.

I moved the case around double checking all the connections to the mobo, drives, psu all good to go and still nothing. As I became a little frustrated I must have twisted the case (sides weren't attached) and I poked the power button...Life!! I was happy and remained online and testing for 3 hrs had a few beers and went to bed. My gf however was more than upset the following morning after she went online for less than 3-4 mins and the machine for no reason shut off. Would not restart..it was dead again.

I pulled the tower and went to troubleshooting jumping the psu plug to see if it had life..came on unhooked from the mobo so my problem was mobo/case related. I reattached the mobo plug and tried to restart and nothing or so I thought. I looked at both of my psu fans and they both spooled when I hit the button but nothing on the board moved and the psu failed any attempt to recycle power until I turned it off. When I did the fans would rotate about 5-10 revs before stopping and I realized the tower was acting like it was shorted. By chance I thought to remove all pwr plugs from the psu and stood the tower up then backed off all 9 mobo screws so the case and mobo were in a relaxed state. I re tightened all the screws snug hooked it back up again and hit the pwr button and it came to life.

I don't know how you installed your board but I've always installed mine laying flat and it's a first for a direct ground problem but it might be worth making sure you don't have a direct to case grounding issue.
 
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bdk98

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Jun 18, 2013
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Well, we did install it laying down on its side, but, I don't believe it was a grounding issue. We took the motherboard right out of the case and placed it on hard-wood flooring and tried it and had the same result. We still haven't been able to get the other PSU out to test it, but we will in due time. I wish I could narrow down the problem more but the motherboard doesn't make a sound, none of the error-indicating beeping or anything of the sort.
 
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Speeddemon3

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Aug 6, 2013
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10,520


 
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Speeddemon3

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Aug 6, 2013
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Sorry it seems the page loaded incorrectly and what I thought was an option to enter another question was just a repost option.

Is there a way you could give me the model number off your psu? If this is possible I may be able to assist you testing it while your disconnected from your mobo. I ran into a faulty internal psu issue during a build where a capacitor was to blame. It was able to shoot enough of a charge through the tower but then died seconds later. If you can get me some more info we may be able to narrow down where your specific component is giving you trouble. If your not even getting beep codes it seems it's not even getting enough power to determine it's own problem.
 
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bdk98

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Jun 18, 2013
4
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10,510


We just tried the old PSU today. I think we've narrowed it down to the CPU. Since it is an Intel CPU, a newer model (i5), it has the feature that shuts down the PC if there isn't a heat-sync detected on the CPU, it will auto shut off the computer. We're starting to believe that the thermal paste has dried up on the CPU and that might be the cause of the issue. I've heard a few people that had fixed the problem by replacing the thermal paste/CPU entirely. I'm not exactly sure what my friend wants to do, but were going to give putting a new glob of thermal paste on a new shot. He might even be buying a new motherboard entirely, since hes taking the processor out anyway. There's a 100$ Gigabyte motherboard he's had his eye on, I think he may be buying that.
 
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