Try out this, maybe will solve your problem.
On the LiveCD boot menu, type the number "3" (without quotes) in the Boot Options. That will boot you to a command line prompt. Login as "root". Then do:
A program will run and you will probably see a thin white border around the black monitor screen, and then a small box asking if you want to save or change. Select change, and the sax2 gui will (hopefully) run, using the vesa X driver. You can probably change the resolution to 1024x768, perhaps no more. Check the monitor configuration that it is correct for size. Then save. The program will close and you will be back at the command line. Then do:
Original thread read here.