I recently bought a used pc. Before buying it I turned it on and the pc booted normally. Since the cable management was crap i took everything out, wiped it down, and put everything back after a few weeks when I got an rtx 3060. The pc booted up, but when I ran a benchmark the temperature rocketed immediately to 90 and a few seconds later it showed no display. I thought this was a cpu problem so I replaced it with another ( Ryzen 5 3500x). I noticed that the socket and cpu were not hot at all, so I thought maybe the mobo was incorrectly judging temperature. When I put in the new cpu, the same boot and benchmark happened. I then reset and updated bios. After this the pc starts up but shows no display and it doesn't turn off, even with the original ryzen 5 3600. Mobo speaker doesn't beep. Even with no ram or gpu, it doesn't reboot loop.
Current Specs:
Asrock b450 steel legend
Ryzen 5 3600
RTX 3060
Corsair RM 750x
Hyper x fury 16gb ram (3200mhz)
Things I've tried:
Different cpu (Ryzen 5 3500x)
Different ram (Samsung 2133mhz)
Clear CMOS
Different GPU (GTX 1060)
Different PSU ( Antec 600w)
Taking everything out and putting a breadboard setup
Pretty sure this is a mobo problem but before I get a new one just wanted some advice
Current Specs:
Asrock b450 steel legend
Ryzen 5 3600
RTX 3060
Corsair RM 750x
Hyper x fury 16gb ram (3200mhz)
Things I've tried:
Different cpu (Ryzen 5 3500x)
Different ram (Samsung 2133mhz)
Clear CMOS
Different GPU (GTX 1060)
Different PSU ( Antec 600w)
Taking everything out and putting a breadboard setup
Pretty sure this is a mobo problem but before I get a new one just wanted some advice