How do I reset the BIOS to default settings on the B550M Pro-VDH WiFi?

You can reset the BIOS in two ways: either go into BIOS and press F6 to load optimized defaults, or use the JBAT1 Clear CMOS jumper on the motherboard. To use the jumper, power off the computer, unplug the power cord, short JBAT1 for about 5-10 seconds, remove the jumper cap, then plug in and power on the computer. (Page 47, Page 38)