Just bought what looked a very lightly used B550 ASRock Taichi. I was able to update bios with a flash drive to make my Ryzen 5 5600x work with the mobo. So far the mobo works great and boots up fine but whenever I try to get into the bios via F2 or Delete I just get a black screen and the error code A9 on my motherboard. I have never seen the bios command not work before, what can I do to fix this???