You will probably have to trick it.
Get to your failed to setup x screen and ctrl + alt + f2 or ssh if you can.
apt-get install xserver-xorg-video-intel
(probably already installed)
Now whatever pops up (either xorg.conf or xorg.conf.pluto.avwizard, or both) open an editor and change the Driver from "vesa" to "intel".
killall -9 whiptail; killall -9 AVWizard_Run.sh
Give it a minute or so and see if it starts blinking and avwiz pops up. If not then:
and it will probably light up. Let me know please.
Additionally if after AVWizard (or during) it dumps to the KDE desktop
echo "/bin/false" > /etc/X11/default-display-manager
And reboot after after AVWizard completes.