I found a workaround for getting BIOS menu back. It’s time consuming, but didn’t need to short any pins.
As always, backup your data first.
#Workaround
- Put Hirens Boot Cd or Windows 10 on a bootable USB
- Start Grub menu before Manjaro boots, enter Grub terminal
- Locate your USB drive with ls command, should be like hd0, hd1 etc
- Use ls to find where the bootable efi-file is - like bootx64.efi
- Load in modules with these commands:
insmod part_gpt
insmod fat
insmod chain
Boot Hirens/Windows with these commands:
chainloader (hdX)/directory/directory/bootx64.efi
boot
If it all goes well your Hirens/Windows 10 should be booting up in a couple of minutes.
Time depends on how fast your media is.
For me, I had to install Windows, couldn’t restore BIOS in Hirens. Windows BIOS utility just crashed.
After I restored BIOS in Windows 10, I could access BIOS from F2 and all boot entries came back in the F12 boot menu.
I installed Fedora using UEFI just for comparison and same thing happened, lost both F2 BIOS acess and all F12 boot entries.
The bug reported to Ubuntu back in 2012 is therfore still not squashed and you should think once or twice before installing a Linux UEFI installion on a Fujitsu AH532.
Thank you all for your help.