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Windows 7: After System Repair, my PC won't even POST.

25 Jan 2012   #11
gregrocker

 

Will the HD maker's HD Diagnostic bootable CD scan autostart?

Unplug the HD to see if known-good CD/DVD will boot. If not then it's likely not your HD. If so then it may have boot sector corruption which is holding up the POST.

But the electrical noise sounds a lot like fried components so work through to eliminate each.


My System SpecsSystem Spec
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25 Jan 2012   #12
NariandColds

Windows 7 Ultimate x64
 
 

Yes, I unplug both drives and still no POST. So I don't think it's the drives either. I didn't see a power surge with my lights, but I remember definitely hearing some sort of crackle. It'll be more difficult to test for my motherboard since I don't have a spare one.
It's a Gigabyte AM2+ board and it has dual-bios if that makes any difference. It's been over two years since I got it and I'd have to dig up my old emails to tell you exactly what type it is.
If it was my PSU would it still be running after the surge? Shouldn't it just not start at all? Right now I start it up and just sits in idle till I try and shut it off again. Speaking of shutting off, I can't shut it off using the power button anymore. I have to manually shut my PSU off to turn my unit of. I held the power button down for two minutes at a point and it just wouldn't shut off.
My System SpecsSystem Spec
25 Jan 2012   #13
NariandColds

Windows 7 Ultimate x64
 
 

I've unplugged both drives and put in a good boot-CD and still no post. Nothing. Now I'm really starting to think it's the mobo
My System SpecsSystem Spec
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25 Jan 2012   #14
DustSailor

Microsoft Windows 8.1 Pro 64-bit
 
 

No, putting in Cds or DVDs or even testing/using HDDs won't matter if you can't even POST. That means it is indeed a hardware error. And no, it could be the PSU. It would make sense since both the motherboard and HDD aren't working, and there is a missing light indicator both on the MB and the HDD.
My System SpecsSystem Spec
03 Feb 2012   #15
NariandColds

Windows 7 Ultimate x64
 
 

So I managed to get a new power supply to test my computer. Removed the old one, plugged all the cables in. As soon as I turn the power supply on using the power button on the back my computer keeps on trying to turn on and then turns off over and over again. The power LED just flashes and the fans don't even get to start but I can see it tries to start again and again. After I turn the supply off with the power button it keeps going on like this for 10-15 more seconds until there's no more power left to use.
Wth is going on? Anyone else have this issue before?
My System SpecsSystem Spec
04 Feb 2012   #16
DustSailor

Microsoft Windows 8.1 Pro 64-bit
 
 

Triple check your cables. Sometimes that can be overlooked.

It could be anything. If you don't have the parts to test the computer with, you may need to see about getting it repaired somewhere.
My System SpecsSystem Spec
04 Feb 2012   #17
NariandColds

Windows 7 Ultimate x64
 
 

I triple checked them already. Still the same. It would just keep on rebooting. The power led just flashes over and over again. I should say it is a OCS ModxStream 500 w power source and the previous one was a Rosewill 600w.
So I started removing components from the case. I unplugged both my harddrives and my optical drive. Still the same. I unplugged my graphic card 2x6 pin power cables. Same. Then I unplugged two of my 4x1gb memory modules and the unit powered on. The GPU fan was maxed out though since it had no external cable so I turned it off after 10 sec using the power button. As soon as that happened, it started flashing again like it's trying to boot but can't.
My System SpecsSystem Spec
04 Feb 2012   #18
Zepher

Windows 7 Ultimate 64bit
 
 

Quote   Quote: Originally Posted by NariandColds View Post
So I managed to get a new power supply to test my computer. Removed the old one, plugged all the cables in. As soon as I turn the power supply on using the power button on the back my computer keeps on trying to turn on and then turns off over and over again. The power LED just flashes and the fans don't even get to start but I can see it tries to start again and again. After I turn the supply off with the power button it keeps going on like this for 10-15 more seconds until there's no more power left to use.
Wth is going on? Anyone else have this issue before?
I've had a similiar issue with an Antec PSU and an Intel Motherboard. They wouldn't work together for some odd reason, but on that system, the fans would turn on and off over and over, basically power cycling over and over.

I would unplug everything (drives, video card, etc) and pull out all the ram and see if it will at least give you the beeps telling you that there is no memory. Use your PSU first.
My System SpecsSystem Spec
04 Feb 2012   #19
NariandColds

Windows 7 Ultimate x64
 
 

Damn it to hell. I unplugged everything. Just kept the power supply in and it keeps on power cycling. I guess I should send it back since I can't use it. That will be a pain.
My System SpecsSystem Spec
22 Feb 2012   #20
NariandColds

Windows 7 Ultimate x64
 
 

After changing both my power supply and motherboard, the PC now finally works again. But now I have a new problem. If I turn it off, it won't turn on again. At least not immediately. I can never really figure out what I do that I manage to turn it back on again, but once it's on it stays on. So now I'm frustrated because I do not know why it won't turn back up once i turn it off.
My System SpecsSystem Spec
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 After System Repair, my PC won't even POST.




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