I have a Dell XPS M1530 whose display card seems to have fried out. Nothing shows up on the screen although I know the laptop boots up just fine. I tried connecting the laptop to an external monitor using the 15-pin cable and it worked the first time. The moment I restarted the laptop, the external monitor started displaying "input not supported" error. I am at a loss as to what to do.
FWIW, I use Fn+F8 key combo to toggle between my laptop's screen and the external monitor.
In many websites it is said that this happens because there is a resolution mismatch between what the laptop's screen can show and what the external monitor can show. Even if that is the case, how do I fix it given that I can't see any darn thing on my laptop? Also, why did it work the first time?