Computer Turns Off 12-15 Seconds After I Turn in on

omegabyte123 · Nov 25, 2017

Yesterday there was a power cut and when everything came back my PC starts doing this. I've tried everything, and, after I tried my mother's PSU on my computer. My mother's computer doesn't work. But her PC just shuts down and doesn't turn on again. Please help I don't know what to do. I've done any kind of troubleshooting.

SPECS: Intel Core I7 4770K

AMD Radeon R9 280X

My mother's computer is the same one but with a core i5

tsnor · Nov 25, 2017

Assume the power cut (or surge that preceded it) broke some part, so we need to find it.

Before you took the PSU from your mom's PC was your mom's pc working ?

After you put the PSU back in your mom's PC what are the symptoms of "But her PC just shuts down and doesn't turn on again. "

Standard debugging is to remove parts until your PC works, then add parts back in until it fails, then to suspect the last part.

Your PC sounds like a failed part shorting and that is causing the PSU to shut down.

Your mom's PC sounds like you knocked a wire off when you took the PSU out or didn't get all the power connection back on correctly when you reinstalled the PSU.

Suggest you get your Mom's PC working first by following the sticky here: http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

Then get your PC working by pulling all cables from the PSU except for the two wires to the MB power (20/24 and 4/8 connectors), pull all wires from the MB except the case header for on/off switch, CPU fan, and wires back to the PSU. Then remove video card, memory, any other PCI cards and any USB devices (keyboard, mouse, network, external sound, etc). When you power up your PC in this configuration it should signal "no memory". If it doesn't the MB, CPU or PSU is bad. If it does signal "no memory", add back memory and see if it signals "no video", then add back hard drive signal and power cables and see if it boots. Then add back usb devices, etc. <power off each time before you move parts>

Sound like a very bad day. Sorry both PCs died on you. Swapping the PSU was very reasonable. If its a decent PSU a short somewhere in your PC should not have hurt the PSU. If the PSU is bad enough to fail that way then good riddance, get a better PSU.

omegabyte123 · Nov 25, 2017

tsnor :

Assume the power cut (or surge that preceded it) broke some part, so we need to find it.

Before you took the PSU from your mom's PC was your mom's pc working ?

After you put the PSU back in your mom's PC what are the symptoms of "But her PC just shuts down and doesn't turn on again. "

Standard debugging is to remove parts until your PC works, then add parts back in until it fails, then to suspect the last part.

Your PC sounds like a failed part shorting and that is causing the PSU to shut down.

Your mom's PC sounds like you knocked a wire off when you took the PSU out or didn't get all the power connection back on correctly when you reinstalled the PSU.

Suggest you get your Mom's PC working first by following the sticky here: http://www.tomshardware.com/forum/261145-31-perform-steps-posting-post-boot-video-problems

Then get your PC working by pulling all cables from the PSU except for the two wires to the MB power (20/24 and 4/8 connectors), pull all wires from the MB except the case header for on/off switch, CPU fan, and wires back to the PSU. Then remove video card, memory, any other PCI cards and any USB devices (keyboard, mouse, network, external sound, etc). When you power up your PC in this configuration it should signal "no memory". If it doesn't the MB, CPU or PSU is bad. If it does signal "no memory", add back memory and see if it signals "no video", then add back hard drive signal and power cables and see if it boots. Then add back usb devices, etc. <power off each time before you move parts>

Sound like a very bad day. Sorry both PCs died on you. Swapping the PSU was very reasonable. If its a decent PSU a short somewhere in your PC should not have hurt the PSU. If the PSU is bad enough to fail that way then good riddance, get a better PSU.

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Computer Turns Off 12-15 Seconds After I Turn in on

omegabyte123

Commendable

tsnor

tsnor

Splendid

omegabyte123

Commendable

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