(1) Re-seat the video card. It may not be properly making contact with the slot. Remove the video card and re-install it. (2) Clear the CMOS - either with the jumper on the motherboard or by removing the battery.
Ryzen 5 Pro 4650g, ASRock B550 Phantom Gaming 4/ac, 16GB Crucial Ballistix 3600MHz, SAMSUNG 970 EVO NVMe 500GB, Super Flower Leadex III Gold 850W