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Known good unit stopped working on the bench.

I work at a repair shop here in Texas, and last Saturday I had a customer bring in a computer for a Windows 8.1 upgrade.

Now, this morning I came into the shop, and put it on the bench to start the service. The computer POSTed, and all the components worked correctly. The only issue was a lack of video output (my KVM switch is kinda odd and takes some fiddling to make it work). After a few unsuccessful attempts to get output, I took a break and started another machine.

When I came back to tackle the first machine again, it wouldn't boot at all. Now, the fans spin up for a second, then die.

I've checked the power supply. It's giving out proper voltage to all connectors. The power cable is not bad, and I know it was working before.

I had someone advise me to reset the CMOS because a faulty BIOs can cause issues like this, but no dice. The motherboard also does not have any bulging or broken capacitors, plus it's only rated for Windows Vista. Which means I'll have to tell the customer he'll need to keep his Windows 7 distro instead.

What on earth could cause a computer to literally die during a ten minute break?

EDIT: Some slight spelling errors.
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  1. It sounds to me like the PC was already on the verge of dying when it was brought in. Perhaps they thought upgrading to W8.1 would solve this problem.

    Ask the customer if they had issues such as NO VIDEO already.

    Your Vista/7 comment is confusing:
    You say the motherboard is only "rated" for Vista. You then say he has Windows 7 and that he'll have to keep that because you can't upgrade to Windows 8?

    Anyway, I'm not sure what you expect me to tell you since you do work in a REPAIR SHOP.
  2. photonboy said:
    It sounds to me like the PC was already on the verge of dying when it was brought in. Perhaps they thought upgrading to W8.1 would solve this problem.

    Ask the customer if they had issues such as NO VIDEO already.

    Your Vista/7 comment is confusing:
    You say the motherboard is only "rated" for Vista. You then say he has Windows 7 and that he'll have to keep that because you can't upgrade to Windows 8?

    Anyway, I'm not sure what you expect me to tell you since you do work in a REPAIR SHOP.



    Hey, just because I work in a repair shop, does not mean I have all the answers. Way to be rude.

    Anyway, I've had a few people suggest that possibility to me already. I hope this isn't the case, and he isn't trying to pull a fast one.

    It's rated for Vista (only has driver downloads to Vista 64 and not past that). Here's the documentation if you want a reference.

    http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail.aspx?DetailID=805&MenuID=16&LanID=0
    http://download.ecs.com.tw/dlfileecs/manual/mb/eng/p4/G33T-M2_manual.PDF

    He says he has Windows 7 on the machine. I suppose it could be possible that the motherboard can be used for Windows 7, but I'm pretty sure it's a bad idea going further to 8. Other than that, I'm asking him if he's had issues with the machine before.
  3. Best answer
    I upgraded my dad's laptop from VISTA to Windows 8 with few issues.

    The ONLY problem I had was a missing driver for the Media card slot. I download the Vista version and it worked fine.

    It wasn't my intention to be rude, I just didn't know what answers you thought we could provide other than the obvious one I did point out.

    Back to the PROBLEM:
    If the computer stopped running properly then flashing the BIOS or other such things don't make sense if it was ALREADY WORKING.

    So either it WAS working and the act of transporting somehow jiggled a wire loose or damaged something or it was NOT working properly already.

    I suspect it was already failing as I said, but there's no way to be certain if the customer says it was fine.
  4. photonboy said:
    I upgraded my dad's laptop from VISTA to Windows 8 with few issues.

    The ONLY problem I had was a missing driver for the Media card slot. I download the Vista version and it worked fine.

    It wasn't my intention to be rude, I just didn't know what answers you thought we could provide other than the obvious one I did point out.

    Back to the PROBLEM:
    If the computer stopped running properly then flashing the BIOS or other such things don't make sense if it was ALREADY WORKING.

    So either it WAS working and the act of transporting somehow jiggled a wire loose or damaged something or it was NOT working properly already.

    I suspect it was already failing as I said, but there's no way to be certain if the customer says it was fine.


    It's all good man.

    It seems like he didn't tell me some information, and he was already having the issues I've been confused about, so, you were right.. I'm going to try a less than intuitive approach, but I suspect the machine is far too gone to get any further.
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