these have a 32 bit efi, but a 64 bit cpu, so typical linux distros get confused, additionally, the video card is a bit unsupported.
at the grub menu, select the “compatibility” option for mit, press “c” and send these commands:insmod efi_gop
insmod efi_uga
insmod font
insmod gfxterm
set gfxmode=1680x1050
terminal_output gfxterm
then go back to the grub menu by pressing “esc” and add these to your kernel params
nomodeset radeon.modeset=0
then presse “f10” to boot into the installer