Quote Originally Posted by joerg
-> Connecting my Laptop to an external monitor works.
-> You're right, the screen stays dark in all the Os.
I don't think (actually hope !?) that Linux got my settings so wrong, because the monitor worked properly under gnoppix. The problem only occured as I shut gnoppix down and rebooted the system.
Hmmm... On an LCD monitor or laptop display, the backlight is an entirely separate function from the display. I don't see how Gnoppix could have caused this problem, but it is possible; the backlight on an LCD is under software control (as a "screensaver"), and it's possible that BIOS settings have been munged--but not likely.

In my opinion (as a hardware and monitor technician), you have a coincidental event. I think that the backlight inverter (the circuitry that turns DC into high-frequency AC to drive the fluorescent-tube backlight) died at the same time you rebooted from Gnoppix.

My only suggestion is to look at the power-management settings in your BIOS, and try to set the backlight to always ON and see what happens.
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-- Michael Rudas
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