Question PC doesn't turn on ?

Jul 21, 2025
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Hi,

When I press the power-on button on my computer, it doesn't turn on, why could this be ?
I'm not a computer wizard, but I do know some things about PCs.

Regards.
 
Have you tried to disconnect the power switch and jump start the board shorting the power pins on the motherboard?

CPU: Intel(R) Core™ i9-10900K CPU @ 3.70GHz

GPU: NVIDIA GeForce RTX 3070 OC

SSDs: Samsung SSD 970 EVO 1TB / Samsung SSD 860 EVO 2TB

RAM: 32GB (2x16GB) Corsair DDR4 Vengeance RGB Pro Black, PC4-24000 (3000), Non-ECC, Unbuff CAS 15-17-17-35, RGB LED, 1.35V

Motherboard: ASUS ROG STRIX Z490-E GAMING

PSU: 850W NZXT C- Series C850, Fully Modular, 80 PLUS Gold

Fans:
120mm Corsair LL Series, LL120 RGB, 9 Blade, PWM, 16 LED RGB Dual Light Loop, Single Fan Expansion Pack, 4-pin

Cooler:
Corsair H150i RGB PRO XT AIO, 3x 120mm ML120 PWM Fans Copper Heatsink Aluminium 360mm Radiator Intel/AMD

Case
Corsair Obsidian 500D RGB SE Mid Tower PC Case w/ Tampered Glass Windows, ATX/ mATX/ mITX/, 3x 120mm Light Loops RGB Fans
 
Last edited:
I've tried that
Just to be clear when you push the power button nothing happens?
If that is correct then.

Flip the power supply switch to off then back on at the back of the power supply and try again.

Remove the power switch connectors at the motherboard and use a screwdriver to short those 2 pins on the motherboard, Google has plenty of videos on how to do that.

If that works then you can move the case reset connectors to to where the power switch ones were and use the reset switch to turn the PC on. (If your case has a reset switch)
 
Just to be clear when you push the power button nothing happens?
If that is correct then.

Flip the power supply switch to off then back on at the back of the power supply and try again.

Remove the power switch connectors at the motherboard and use a screwdriver to short those 2 pins on the motherboard, Google has plenty of videos on how to do that.

If that works then you can move the case reset connectors to to where the power switch ones were and use the reset switch to turn the PC on. (If your case has a reset switch)
I'm not touching the motherboard. But thank you for the help.