System wont start despite power

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a sandwhich

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Aug 4, 2010
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Went to turn on my computer today and found it wouldn't start. I checked the lights, and the power and reset button on the motherboard were lit, but pressing either does nothing. I dusted everything and made sure all cables were solid, bust still no start. It was working fine this morning. What could have happened? What should I check to make sure it isn't something simple?
 
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hang-the-9

hang-the-9

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Mar 25, 2010
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Power supply or motherboard are the first things to check.

Try resetting the BIOS, if that does not work, check the motherboard for bad capacitors. If that looks OK, try a different power supply. If that does not work, try a different motherboard.

We're assuming that you are getting no boot at all, no drive or fans working correct?
 
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A

a sandwhich

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Correct. I looked around and didnt see any bad caps, and no fans are starting. The two power buttons on the mobo still light up so that makes me believe it isnt the psu. Ive never seen anything like this before, really strange. I popped out the cmos battery and checked it, it was still good, and put it back in. My ups system is still chugging fine, and plugging into a wall makes no difference. This morning it worked, now it doesnt. The only thing I have done is I took out and put back in a ssd two days ago. All I had to do for that was remove the back panel, so I doubt it affected anything.
 
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TenPc

TenPc

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Jul 11, 2012
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That means the PSU is faulty or the power point is at fault. You can't use a UPS for a printer orr any othe product, it's simply for the protection of the PC so no other cable should be connected to it.

Try the PSU cable directly in a different power point.

What brand/model is the UPS?
 
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TenPc

TenPc

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Sometimes it does happen, for no apparent reason. It's happened to me. Only wild speculation will give you the "truth".
As best as I can figure, the PSU has had a power surge of some sort and the whole rig is dead, the only thing that might still work would be the ram and the hdd, the motherboard and the PSU has carked it. That's what happened with my phantom issue. Although you still get a glimmer of life from the PSU, it doesn't last long, only a moment or two.

You could try reseating everything, thermal paste, reseat the cpu, disconnect all the cables from the motherboard and test just the cpu, ram and psu, you might get life but I doubt it. Try replaciing the PSU with something similar or less watts. Remove the graphics cards and use onboard video out, remove the cmos battery for 10 seconds to reset the defaults.

Nothing you do seems to work with these phantom issues but at least you can try, you might actuially find the problem yourself. Report back here when you do.
 
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