Pre Warning - A.0.402 Firmware & Rolling Back
A.0.402 Firmware has an issue where you can upgrade but not role back IE Custom Rom running .55 / .69 firmware.
My device boots and the audio is there, and it also registers touches but no screen, please see below.
It turns out that any old firmware is not backwards compatible with the new recovery which was done by Doomlord.
Any .55 / .69 Firmware will NOT Work if flashed etc and all roms will need to be updated to be compatible with the new Recovery.
FTFs do work at present but flashing the recovery over these will stop the screen from working.
Naturally the recovery is compatible with .402 based firmwares and doesnt cause the screen issues. (So yes... it means you can have root.)
I've clearly had more mobile devices than you... Deal With It!