I think i killed my motherboard

[Be Here Now]

So i have a usb hub and i plugged a 12v dc power supply into it and my computer turned off and the usb hub started smoking and 2 capacitors exploded and now my pc won't turn on.

[Levent]

so you fed 12v in to 5v USB hub that was connected to your computer? lul...... check for burn marks on the motherboard.

[Fasauceome]

remove non critical parts to bare minimum, attempt boot again.

[Be Here Now]

Just now, fasauceome said:

remove non critical parts to bare minimum, attempt boot again.

Thanks for the actual formal replay. I've tried turning it on with no headers connect nothing connected to psu except the long connector and cpu power, no gpu, and no sata cables plugged in or any other cables only the power cord, and it shows no sign of life, not even a fan spin

[Fasauceome]

Just now, Jokey Carrot said:

Thanks for the actual formal replay. I've tried turning it on with no headers connect nothing connected to psu except the long connector and cpu power, no gpu, and no sata cables plugged in or any other cables only the power cord, and it shows no sign of life, not even a fan spin

Actually I don't have a very good image of what exactly went down. Can you snap a pic of the configuration that caused the issue?

[Be Here Now]

Just now, fasauceome said:

Actually I don't have a very good image of what exactly went down. Can you snap a pic of the configuration that caused the issue?

just picture the scene computer turned on watching youtube, usb hub plugged into compter. Then i plug the power supply into the barrel jack on the usb hub, theh my computer turns off.

[Moonzy]

3 minutes ago, Jokey Carrot said:

I've tried turning it on with no headers connect nothing connected to psu except the long connector and cpu power, no gpu, and no sata cables plugged in or any other cables only the power cord, and it shows no sign of life, not even a fan spin

does your CPU have iGPU?
if yes, try booting up your system with PSU, CPU (with cooler), Motherboard, and 1 stick of RAM (bare minimum)
connect only CPU 8/4-pin and 24-pin to the motherboard

 

clearing CMOS would probably be a good idea too

 

hopefully your motherboard is well designed that the damage is only affecting the USB VRM components and not your CPU

[Moonzy]

2 minutes ago, Jokey Carrot said:

Then i plug the power supply into the barrel jack on the usb hub

does the power supply come with the usb hub?

[Be Here Now]

Just now, Moonzy said:

does your CPU have iGPU?
if yes, try booting up your system with PSU, CPU (with cooler), Motherboard, and 1 stick of RAM (bare minimum)
connect only CPU 8/4-pin and 24-pin to the motherboard

 

clearing CMOS would probably be a good idea too

 

hopefully your motherboard is well designed that the damage is only affecting the USB VRM components and not your CPU

it doesn't trun on at all i can't even get to bios the power supply doesn't even spin up.

[Moonzy]

2 minutes ago, Jokey Carrot said:

it doesn't trun on at all i can't even get to bios the power supply doesn't even spin up.

does your motherboard light up? there should be sign of life even if idle

 

if not, two possibilities, dead motherboard or dead PSU

 

you could also check if the fuse in your PSU cable is burnt if there is one (normally only found in UK plugs)

[Be Here Now]

it is a uk cable i will check the fuse

[Be Here Now]

fuse looks fine tried another cable nothing changed

[Be Here Now]

4 hours ago, Jokey Carrot said:

 

Update my psu died