Hello,
I just installed Ubuntu 23.04 on Lenovo Ideacentre B540.
In Bios : UEFI Only, Quick Boot Disabled.
Install OK but at boot :
Error 1962: No operating system found. Press any key to repeat boot sequence.
I made a Boot report on https://pastebin.ubuntu.com/p/D8RCCbGxTZ/
Thx in advance
Arnaud