when pressing the bios key at startup, the screen just goes black. I have an X570 Phantom Gaming ITX-TB3 from asrock. The thing works fine, with the exception of the bios ... I've tried reseating the motherboard-battery, using the clr-cmos switch, using the boot-to-bios software from an asrock rep, and even switching out the board for a new one. nothing has helped thusfar, and I really just want to do some minor overclocking. I was hoping it might be a display error but even with my new monitor it is still booting to black. Any help would be appreciated, as I really want to keep the TB3 port and I don't want to have to buy another board.
My system specs:
Ryzen 7 3700X
RTX 2070 Founders Edition
2x8GB Corsair Vengeance running at stock speeds
X570-ITX/TB3
some ssds from wd-blue