The main screen of my tablet PC goes black as soon as I plug-in the VGA cable to a second monitor. I guess this is the result of me selecting an incorrect display mode for the monitor. The secondary monitor (A Samsung 1920x1200) complains of the video signal mode and does not display anything other than an error window.
The dual display mode worked fine before I made that mistake. I guess the resolution used for the secondary monitor is now incorrect. I would need to reset that value with the secondary monitor disconnected. That's what I am looking for.
Now when the VGA cable is disconnected, I get back the screen. I have looked at all display controls and the 945gm controls, but I had no luck restoring the secondary monitor settings.
I have tried booting Windows7 with the secondary monitor connected. I get both the main display and the monitor working in mirror mode when in BIOS mode, but I loose both as soon as windows7 is activated.
I would need some means to have windows7 reset the whole display subsystem.
Does anyone knows how to solve this issue.
Thanks for any clue.
PC is Motion LE1700, L7400 dual processor, 1440x1050
Secondary monitor is Samsung 1920x1200