Am 02.08.2024 um 13:20 schrieb Richard Owlett:
> They report "GNU GRUB version 2.02~beta3-5"

Hey, that is good news!
Apart from reading up on grub2
<https://www.gnu.org/software/grub/manual/grub/grub.html>, you can also
interrupt the boot menu and select a stanza, then press e to read it and
eventually modify it (temporary change only).
More adventurous would be to press c to get grub the commandline

start with ls to list the devices (notice the grub way to name them)
you can also look into the filesystems with a properly tailored ls command.

one of the easier excercises: help grub to locate the grub.cfg file and
have it use it:

# something along the lines of:
insmod part_msdos
insmod ext2
configfile (hd0,msdos2)/boot/grub/grub.cfg

# of course, make sure you have YOUR device addressed properly

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