Question Pc gives no signal

May 5, 2020
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My pc gives no signal, it turns on and everything spins etc. But it doesn't give a signal. My GPU just gives a white flashing light. im thinking it could be my psu but im not sure.

here are my specs:
Gigabyte rx580 8gb
Ryzen 5 2600
16gb RAM @ 3000 mhz
Asrock fatality b450m mobo
240gb ssd
2tb hdd
Corsair CX550m psu