Not sure if I understood everything. I created the USB bootstick with the latest 5yr "warranty" versión.
Then, I reebooted and selected the 1st option: start or install.
I then selected boot from USB.
Then I got the BIOS Error screen for some second.
After that, the yellow screen from the UEL below, but with white instead of green.
Note: I've never seen a working #Linux desktop.
@amunizp @ubuntu @Linux4Everyone @linux
...need to be reset in the BIOS, though what, no idea whatsoever.