Masch- I have been going through this same situation with my VIA Board and Lilliput screen. I have the exact same setup as you, and have tried all the same solutions you have done.
However, after I set the BIOS to CRT + LCD and started the computer, I went into the Display settings. I went to the Advance section and when I went to choose LCD it was not an option. I have tried every BIOS option you can choose, and it always comes up with CRT and TV under Advanced options.
Do you have any ideas for that.?
My Lilliput screen will show the Windows Logo with the status bar loading, and after that happens it goes blank then in green shows the "Over Range" message. I've looked everywher and can't figure out what that even means. Do you know what it means?
I have tried changing the display to every option I can, and still no luck... I am out of ideas, and have no idea what to do now.