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Windows 7: Computer won't boot randomly, but always does if I flip the PSU switch

03 Nov 2014   #1

64 bit
Computer won't boot randomly, but always does if I flip the PSU switch

Hello, I've had a problem for a long time, with it going away and back and I think I need help now.

I'm literally afraid to turn off my computer because it won't turn on, and if I leave it on, it may randomly turn off with Kernel-Power 41 being in the log. I have switched almost all parts now except the motherboard and the CPU, but the problem persists.

What happens is:
The fans are behaving differently, I would guess they are supposed to slow down at once, but they won't so it's easy to hear if the PC will boot or not.
Monitor doesn't get a signal
Nothing happens until I hold the power button to turn it off or it just restarts randomly.

However I can boot it each time if I flip the on/off PSU switch really fast. The fans slow down, and everything goes ok, but I don't think it's a good idea to do it.

The PC also randomly shuts down, I've mostly seen it happen after long periods of being turned on.

I've made a clean start a few days ago after I got my SSD, but it's no good.

Would appreciate help.

My System SpecsSystem Spec
03 Nov 2014   #2
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64

You have what is considered a quality power supply but the problem does sound like a power supply.
It could be shutting down because of power supply temps. Check and see if the power supply fan along with other fans are clean and working properly.
My System SpecsSystem Spec

 Computer won't boot randomly, but always does if I flip the PSU switch

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