Computer not powering on, tested PSU w/o Motherboard and works fine

[GusFawkes]

Have used this build for over a year, other day the computer would not turn on (hit case power button, no display, fan noise, nothing).

Follow the steps of disconnecting the PSU from everything but fans, and using a paperclip to short the green and black wire on the 24pin connector. Doing this yielding the PSU fan spinning up as well as the fans in my case the PSU was plugged into, so PSU seems to be doing fine.

My question is what and how to test next. I know the PSU is good so is the motherboard the next culprit? What are the steps to testing if a motherboard is good or bad?

This is the motherboard I have: ASRock X79 Extreme6 LGA 2011 [http://www.newegg.com/Product/Product.aspx?Item=N82E16813157289]

Thanks for any help!

 

[Unolocogringo]

First thing I would try is to plug everything back in and do the paperclip jumper in the back of the 20/24 pin plug to rule out the case switch.
You can also use the paperclip to short the 2 pins for the power switch front panel connector. Is the 20/24 pin connector is not easily accesable.

 

[GusFawkes]

First thing I would try is to plug everything back in and do the paperclip jumper in the back of the 20/24 pin plug to rule out the case switch.

I'm pretty sure this is what I did as stated, unless this involves more than the common PSU test I described?

 

[GusFawkes]

I would swap in a known working PSU... PSU's need to be tested under load.

I purchased a new PSU today and am still running into the same issue. Any advice on further testing the MoBo?

 

[Unolocogringo]

Unplugging everything and doing the paperclip test with the fans connected only shows your power supply will put out a small amount of voltage. Not that it is good.
Doing the paperclip jumper on the 20/24pin connector or the front panel connector with everything coonnected rules out a bad case switch.

 

[Tardis40b]

I would swap in a known working PSU... PSU's need to be tested under load.

Testing a motherboard can be tricky. First remove the CPU and memory chips and plug in only the CPU fan. Hit the power switch. If the fan comes on the motherboard is not the problem. This was a suggestion by the folks at ASUS when I was trying to figure out if the motherboard I was using had failed or if it was the CPU. In my case, the CPU had failed and after replacing it the computer ran.

 

[easymobibuilder]

Have used this build for over a year, other day the computer would not turn on (hit case power button, no display, fan noise, nothing).

Follow the steps of disconnecting the PSU from everything but fans, and using a paperclip to short the green and black wire on the 24pin connector. Doing this yielding the PSU fan spinning up as well as the fans in my case the PSU was plugged into, so PSU seems to be doing fine.

My question is what and how to test next. I know the PSU is good so is the motherboard the next culprit? What are the steps to testing if a motherboard is good or bad?

This is the motherboard I have: ASRock X79 Extreme6 LGA 2011 [http://www.newegg.com/Product/Product.aspx?Item=N82E16813157289]

Thanks for any help!

Hi sorry to.jump in on here but i have a similar issue.
my pc was working fine a few days ago and went to power up and nothing.
i have a win 7 running on 8gb ram on a k10n78 board.
i have a thermaltake dr.power tester on the psu and all seems ok all lights came on and hard drive started up but not board fan.
i also have a motherboard 4 led tester via usb but as seems no power to board nothing happens. would it be safe to say i need a new board?
oh and on testing the psu only the -5v light didnt come on but all others did.

any help would be great as i have to use my mobile on here lol
thanks

 

[easymobibuilder]

Hi just wanted to update how i have fixed mine.
When i tried to do the power switch test it still didn't work, so as a last resort i too everything off the board and just left 24 pin and 4 pin in and then just did switch test and it worked..

I found that an extra usb connection cable was the problem as when i connected each thing until it didn't work that was the culprit.

so i would say if psu def works trying right back to basics and test with each one.
hope that helps
saved me a fortune