Nothing happens when I press the power button

CheesyBalls · Nov 13, 2016

My PC overheated last week, I left it to cool down for a day and when i go to press the power button nothing happens. No lights or fans. Is there any way to to diagnose which of my components is causing issues?

Thanks.

weberdarren97 · Nov 13, 2016

There are multiple possible causes for this. But before we jump into all of that, please do a CMOS reset.

How to clear CMOS, universal technique:
1) Turn the machine off and unplug it.
2) Press and hold the power button for three seconds to drain any remaining power.
3) Remove the CMOS battery from the motherboard.
4) Get a snack.
5) After five minutes have passed, put the CMOS battery back into the board.
6) Done.

weberdarren97 · Nov 13, 2016

I would also like for you to list the full specs of your machine. Be specific, include power supply make and model.

CheesyBalls · Nov 13, 2016

I do not have a full list of my specs, but I know that I have an MSI 970a-g43 motherboard.

Also, I can't see a CMOS battery on my motherboard, do I need to 'Clear CMOS Jumper'?

weberdarren97 · Nov 13, 2016

CheesyBalls :

It looks like a large watch battery. It is usually near the expansion slots so it may be hiding under any expansion cards you may have in the system.

CheesyBalls · Nov 14, 2016

I removed my graphics card, an MSI R9 270x, and cleared the CMOS.

weberdarren97 · Nov 14, 2016

CheesyBalls :

Once you've put the battery back in, put the video card back in and try turning it on again.

CheesyBalls · Nov 14, 2016

Tried it again and there are still no signs of power. Thanks for the suggestion.

weberdarren97 · Nov 14, 2016

Please disconnect the power supply from the machine. Make sure there are no longer any connections being made between the power supply and the other components.

Get yourself a paperclip and follow these instructions on how to see if your PSU will manually start up or not:
1) Unplug the power supply.
2) Hold the motherboard power connector (20 or 24-pin) so that the pins are facing you and the clip is to the right.
3) Insert the paperclip into the second and fourth pins down on the right hand side.
4) Holding the connector by the plastic and making sure not to touch the paperclip, plug the power supply back in.
5) Observe whether or not the fan on the power supply spins.
6) Reply with results.

CheesyBalls · Nov 16, 2016

Going to try this now and looked up an image for reference. I've seen images of paper clips in 3rd / 4th and 4th / 5th. Is there any difference? Want to double check.

weberdarren97 · Nov 16, 2016

CheesyBalls :

There's a big difference. Only the second and fourth will start the unit, the others will simply short it out.

Use this image as a reference and put the paper clip in the spots labeled -12V and PS-On.

CheesyBalls · Nov 19, 2016

There's no ventilation holes(?) on my power supply, looking through the back I don't think there's a fan inside of my power supply.

Images for reference: http://imgur.com/a/t6P7a

weberdarren97 · Nov 19, 2016

Honestly, without knowing the specs of the machine I'm a little lost here. I'll refer your question to some other knowledgeable users, please wait patiently for their response.

Dark Lord of Tech · Nov 19, 2016

What CPU were you running on that board , it fails a lot when a 125w CPU is used. No heatsinks on the VRM and can't handle it.

13thmonkey · Nov 19, 2016

unselected BA as per this request http://www.tomshardware.co.uk/forum/id-3245125/unsolved-thread.html

Dark Lord of Tech · Nov 19, 2016

Think you need to again.

CheesyBalls · Nov 19, 2016

Thank you for unsolving 13thmonkey and thank you for helping weberdarren

I have an AMD FX 6350 on the board

Dark Lord of Tech · Nov 19, 2016

PROBABLY your board failed , not 100% , but the G43 due to it's poor power and thermal design should not have a 125w CPU on it.

weberdarren97 · Nov 19, 2016

Agreed. Hopefully you didn't lose your CPU. Some boards lack fail safes and you'll get 12V straight to the CPU in the case of a chain reaction of MOSFET failures. This is rare however and I can say that your CPU probably still works, but cannot guarantee it.

CheesyBalls · Nov 20, 2016

Oops, clicked the 'solved' button in my email notification. Sorry.

I'll probably be taking my computer to the nearest computer shop to have it repaired. Thanks for helping everyone.

weberdarren97 · Nov 20, 2016

CheesyBalls :

I wouldn't do that. A simple change of motherboards will likely solve your problem.

Nothing happens when I press the power button

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