Need more info. List all specs.
Mobo: b450 gaming plus
CPU: ryzen 5 2600
Ram: Corsair 2 x 8gb ddr4
Power supply: can't write remember but 750w
Video card: Radeon 290
This all happened after I plugged in a camera and turned on the PC. Heard a pop and tripped a breaker. Ordered the new power supply and installed it and nothing. Got the motherboard repaired and installed everything nothing.
I Pulled everything out of case and was only able to get the motherboard to power up after the CPU is removed. Ram and gpu can be in for it to power up but the second I add the CPU in it stops powering up.