I went from a Radeon R9 390 to a RTX 2070 super and i uninstalled AMD software and switched cards. Now my pc doesn't even go to bios with the new or old GPU installed or Igpu i tried that aswell. What did i [censored] up?
Corsair rmx 750 gold less than a year old2070 may have put too much demand on the PSU and it gave out.
PSU make, model & age?
I have a msi B450 m2 pro with an AmD ryzen 3600.What is the make/model of your motherboard and processor?
Modern graphics cards need a UEFI bios to run.
But, that would not explain why you can not get into the bios with your old card.
Some monitors do not autodetect the input connection.
Is it possible that you need to use the monitor onboard control to do the selection manually?
How do you get into the bios?
Perhaps your keyboard is not properly connected.
Ultimately, you need to get your old card to display something.
It will have a low res default mode that runs without any drivers at all.