- Dec 29, 2018
- ASRock Z390 Phantom Gaming ITX
- RX 580
- Mobile Phone
Do you have Windows installed too? I upgraded to 4.0 and was able to get it back to 1.2. While in Windows, I downgraded to 1.6 then to 1.3. After that, I was able to get to 1.2 by flashing it from a flash drive in setup. I did it late last night so I can’t remember if I went directly from 1.6 to 1.3 or if I went 1.6 to 1.5 and then 1.3DO NOT UPDATE TO P4.00
I cannot revert the BIOS to 1.6 or lower.
I hope this helps.