I'm running as a second computer an old Amilo Li3710 updated some time ago from Win 7 to Win 10 22H2 and change of hdd to ssd. I was in the process of changing Bios Legacy to UEFI in order to make a bootable usb to try out Win 11 when the laptop switched off leaving a black screen and flashing cursor. I can get into the boot menu but the default repair and all other settings do not work. Other than getting another motherboard which I really don't want to do on a 15 year old laptop, I would appreciate any suggestions and advice on a way of resetting the system. Thanks.