I no longer have a Matrix Infinity chip, so I can't test this now, but I used to have one earlier. Sometimes when I messed up the settings I was able to recover by again booting the firmware installation disc. This should let you start over with defaults for all settings (thus restoring your display mode).
Originally Posted by sebnic
Edit: I just realized that the firmware installation menu might also come up in VGA mode, making you unable to see it. But you should be able to fix that by booting in 'recovery' mode. The following info on how to do that is from the readme text in the release package of firmware 1.82:
Hopefully this will fix your problem.
- NOTE : You can always recover from a bad flash by entering recovery mode.
==== This will let you boot the upgrade disc to reflash your Infinity.
To enter recovery mode:
V1-V12 and V14 PAL :
Hold the reset button until the blue eject light turns on.
V14+ USA and JAP
USA : Hold reset until blue eject lights turn on, wait 3 seconds and
tap reset again.
JAP : Hold reset until blue eject lights turn on, wait 3 seconds and
tap reset, wait 3 more seconds and tap reset again.
Best regards: dlanor