x470 Master sli/ac BIOS update issue

Hello I have been trying to find a solution and can't seem to get one. I have the x470 Master sli/ac and I was on 1.9 I think I may have messed things up I am trying to go from a 2700x to 5700x and I read that the path was 1.9 to 3.4 but after doing that I am now stuck on the asrock splash screen and can not go forward after what I thought was a successful bios upgrade as is said it was done and press enter to continue. I have been stuck on what to do next as it my keypresses don't seem to do anything its just stuck. I tried unplugging the system and cmos battery i have heard the buffer sound of too many keypresses a couple of times but it does't want to enter the uefi or the instant flash utility. please help!

I have another drive with linux mint and i install it in the same slot that doesn't work with an unallocated gpt partition and the linux loads fine but the same m.2 slot with the other drive that is unallocated gpt hangs 2 different machines?!?!

Xaltar wrote: This is the downside of gpt (UEFI partitioning). Corrupted settings can cause major issues. If you have not already, see if you can get the system to boot with the problematic drive set as non bootable in the UEFI (under boot settings remove it from the list).

Thank you for the reply, my biggest issue thus far is if this one m.2 is in the primary spot in either machine it hangs the bios so I am unable to even enter the uefi when the drive is in the slot. however strange it is when i put the offending drive into an enclosure over usb the bios does NOT hang and the windows installer recognizes it but says can't install windows to the drive over usb. I hope this makes sense. I watched the youtube video you posted twice and I believe unless the clean function does something that makes the drive fresh??? (for lack of a better description). I have reformatted from mbr to gpt and used diskpart to get rid of a recovery partition. I will try the clean function to see if that helps.