my computer wont turn back on after unplugging power cable

[iwantmycomputerback]

So this had happened a few times through out the last year. Sometimes when I unplugged the computer it wouldn’t let me turn it back on for about 5-20 minutes and it wouldn’t show any signs of power either. Yesterday when I unplugged the power cable to move my pc downstairs it happened again, only this time the computer wouldn’t turn back on no matter how long I waited. After waiting for about 15 hours and looking around the internet I figured it must be the PSU that is broken since the computer showed absolutely no signs of power. So I bought a new PSU went back home and installed it, and the computer worked…until I unplugged the power cable again to move my pc and now it is back to being completely dead. Can someone please help me pinpoint exactly what is the problem because I don’t want to have to spend more money buying unecessary parts. Is there anything that you can rule out? It’s like my computer just randomly decides when it wants to start working and then it does so perfectly until I unplug it again and it’s dead for however long it feels like. I built the computer myself almost 3 years ago. Specs: Asrock Z97M Pro4 motherboard i7 4790k gtx 980 16gb ram corsair 240 air chassi 1 ssd 2 hdd. my old psu was 550w and new one is 750

[TwitchisMental]

Hello iwantmycomputerback and welcome to PCHF. We can certainly assist you with this issue.

After reading your post, the first thing I would suspect is some sort of power issue like a short.

Some quick ideas that you can check for -

Make sure your motherboard is on all the risers and screwed in securely.

Make sure all power cables are securely connected to the motherboard and other hardware.

Be sure to check the capacitors on your motherboard. A blown capacitor could cause the issue you are having.

Check the back of your PSU and check the voltage switch.This small switch is used to set the input voltage to the power supply to either 110v/115v or 220v/230v. In the US you would use the first, in Europe you would use the later.

I would also be sure to re-seat each piece of hardware and use a can of air to air out the insides.

Also, have you tried using a different power cable? If so, do you get the same results?

[iwantmycomputerback]

Hello iwantmycomputerback and welcome to PCHF. We can certainly assist you with this issue.

After reading your post, the first thing I would suspect is some sort of power issue like a short.

Some quick ideas that you can check for -

Make sure your motherboard is on all the risers and screwed in securely.

Make sure all power cables are securely connected to the motherboard and other hardware.

Be sure to check the capacitors on your motherboard. A blown capacitor could cause the issue you are having.

Check the back of your PSU and check the voltage switch.This small switch is used to set the input voltage to the power supply to either 110v/115v or 220v/230v. In the US you would use the first, in Europe you would use the later.

I would also be sure to re-seat each piece of hardware and use a can of air to air out the insides.

Also, have you tried using a different power cable? If so, do you get the same results?

thank you for your thourough response but unofrtunately I have tried all of these things but to no avail. I think that my motherboard is just ********.

[TwitchisMental]

thank you for your thourough response but unofrtunately I have tried all of these things but to no avail. I think that my motherboard is just ********.

Sorry for the late reply.

So just to confirm, you have checked every single cap for possible issues? It could ranging from bloating, white stuff coming out, a burned look, etc.

If this was a motherboard issue causing this, I am pretty sure you would find a bad cap.(although it is possible there is no blown caps)

Beyond that though, I would suggest removing your PSU and using a PSU tester on it to confirm if it is infact dead now.

[veeg]

Any updates for us?

[veeg]

Any updates for us? After 48 hrs this thread will be closed.