restart before bios

CPU - Ryzen 3 3200G Mobo - MSI B450M PRO M2 RAM - Corsair LPX Vengeance 3000 mhz, 1×8GB PSU - Corsair VS 450 I was using a Ryzen 2200G till now. But somehow PC wasn’t turning on. I took it to a repair shop. There the guy told me CPU is dead and Mobo is faulty too. He fixed my motherboard and...

Hi. Today my PC would keep restarting. Fans turn on but after few seconds it restarts when BIOS screen is loading. I kept checking and turns out my GPU was causing this. I tried a different gpu just connected to pci slot without power and it didn't restart the pc. Last night everything was fine...