A620M-HDV/M.2+ & fw 3.18.AS01 => no boot

PC from signature from one day to another does not boot at all. Now I think it is possible it was testing the memory for some reason and that's why it seemed to hang on boot. However no tinkering with the bios or hw changes were applied. It worked fine last night and the next morning it did not boot. Given that the pc did not boot when it was first put together, and a bios update was necessary (it turned out that the factory bios was not compatible with the cpu), I decide to update the bios through the bios flashback feature to the latest (at the time of writing v3.18.AS01) version. The update was successful. However the bios does not boot to the nvme drive, every time the pc is powered on it goes straight to the bios screen. Also, there is no boot override nor boot priority devices to select although usb devices are recognized and can boot properly. Default Bios settings were used before the update and default settings are also set now. OS installed in nvme is archlinux. From pendrive, windows and linux can be booted properly.
How can I have my drives recognized for boot?
Thank you.

zwastik wrote: PC from signature from one day to another does not boot at all. Now I think it is possible it was testing the memory for some reason and that's why it seemed to hang on boot. However no tinkering with the bios or hw changes were applied. It worked fine last night and the next morning it did not boot. Given that the pc did not boot when it was first put together, and a bios update was necessary (it turned out that the factory bios was not compatible with the cpu), I decide to update the bios through the bios flashback feature to the latest (at the time of writing v3.18.AS01) version. The update was successful. However the bios does not boot to the nvme drive, every time the pc is powered on it goes straight to the bios screen. Also, there is no boot override nor boot priority devices to select although usb devices are recognized and can boot properly. Default Bios settings were used before the update and default settings are also set now. OS installed in nvme is archlinux. From pendrive, windows and linux can be booted properly. How can I have my drives recognized for boot? Thank you.

using USB bios flashback erases info from the NVRAM. After that only windows EFI entries are being automaticaly detected by the ASRock bios.

you can clearly see in your picture you have no GRUB bootloader in the boot options,

you need to add entry to the NVRAM - you need to reinstall GRUB (grub-install... ,while booted with arch iso, mounting / and EFI partition and arch-chroot to your instalation) or manualy add entry using EFIBOOTMGR (the EFI files are in the EFI partition, just not added to the NVRAM) or using windows EFIBOOTMGR equivalent - bcdedit





Edited by M440 - 5 hours 34 minutes ago at 1:11am