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Windows 7: Motherboard has power, but PC won't turn on.

23 Jun 2017   #1

Windows 7 Ultimate x64
Motherboard has power, but PC won't turn on.

So for the past 2-3 weeks, my PC has not been powering on. At first, this was only occasional and did not happen every day. But now, my PC has power to the mobo and won't turn on when I push the on button on my case. Rarely, if I keep the motherboard powered, the PC will just turn on by itself at random times, and the problem would be resolved until the PC goes to sleep for a long period of time, but recently this never happens. And when the mobo powers on, I get no kind of input and no beeps or anything. I assume this has to do with the power supply since everything else seems to be working in check, any kind of help would do.
Specs :
Corsair Graphite Series 230T
AMD FX 8350
8GB DDR3 Vengence
EVGA 500W Certifed
ASUS M5A97 R2.0

My System SpecsSystem Spec
23 Jun 2017   #2

Win7 pro x64

Your symptoms could be the result of a bad switch. I would try disconnecting your case power switch from the mobo, and use a scewdriver or whatever to manually short those two pins to turn the machine on.

How to turn on your computer without your case - YouTube
My System SpecsSystem Spec
23 Jun 2017   #3

Windows 7 Ultimate x64

Yeah, even when it turns on I get no kind of input post beep or beep code
My System SpecsSystem Spec

23 Jun 2017   #4
Mellon Head

Win 7 Pro x64/Win 10 Pro x64 dual boot

I would suspect that your motherboard has bit the dust then.
My System SpecsSystem Spec
23 Jun 2017   #5

Windows 7 Ultimate x64

Strange, but as I stated about how it would turn on at random times, it just happened right now. But if I turn off the pc or let it sleep for a while it wont show display or anything. More on the post-beep of the pc had a extra short beep with it.
My System SpecsSystem Spec
24 Jun 2017   #6
Wandering one

Win7 sp1 Pro 64bit / XP sp2 Pro (games only)

Had same problem a couple of years ago. Was a bad video card (over heated, neglected cleaning) telling the PSU to cut output.
My System SpecsSystem Spec
24 Jun 2017   #7

Windows 7 Ultimate x64

Think I can contact EVGA to get a replacement for my card?
My System SpecsSystem Spec
24 Jun 2017   #8

Windows 7 HP 64

It can be many things.
- The power supply has many supply voltages. One of them can be failing.
- It can be the switch, but don't think it is.
- It can be the video card.
- It can be the MB or CPU.

Try to make it simple.
- Disconnect all HDD
- Take the graphics card and use internal graphics.
- Take out the case front connector from MB and try start by shorting the pins.
My System SpecsSystem Spec

 Motherboard has power, but PC won't turn on.

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