I have the same problem. At some point my screen started to show up some artefacts. 10 sec after it started bluring then went totally black. Even when I reboot my laptop, its still black. When I plug a VGA monitor, I see a part of the booting screen with lots of artefacts and right after windows loading, I goes black again, as if it was not supporting the resolution change. When I run the diagnostic utility, I get the Vesa Function 0x4f02 returns AX=14f too.
I think our vid card is toasted :/
Another thing is that my USB mouse started to some times kinda disconnect. I had to unplug it and replug it to make sure it would work. Not sure it has anything to do with this but we never know!
Well after being away for awhile (on vacation), came home and finally phoned Dell (my laptop is still under warranty). I was connected without delay to a real person that could speak english (he was in Utah) and was on the phone with him for about an hour. He had me do some tests and even take the cover off the power switch and hinges to check for proper connection of the LCD cable to the video card. After all that, he concluded that the LCD panel had to be replaced and said that they could do it two ways, A. Send me the LCD screen and have me do the replacement myself, or B. Have a tech come out to my house and do the replacement (the warranty covers this). I chose B. This call was made on Good Friday, (I was amazed they were available on the holiday) and was told to expect a call from a tech next week. The tech called this afternoon at 12:45PM and was here (I live 20 mins outside of the city) by 1:15PM and had the screen replaced and the whole thing put back together by 1:45PM and was gone at 1:50PM. My laptop is now working again, I am elated! And I have nothing but praise for Dell, so glad I have this extended waranty! The tech didn't know why the screen failed, just that sometimes it happens. He said sometimes it is simply a bad connection to the LCD panel (inside the back) but in my case that was not the problem. I asked him what they will do with the bad screen and he said they will try to repair it, and if they can't then they will "recycle" it. It sure would be nice to know why it failed, as I don't want it to happen again, but it sounds like it was just a random failure, and not something that I caused.
Happy Dell customer
Glad to hear your problem was fixed by Dell...After discussing with coworkers, I "braved" the task of removing the cover that you described exposing the connection to the LCD screen. By "trial and error" method, we were able to move wires, push on connectors, etc., enough to get the LCD screen to function again! Seems like there might be a connection problem near the F8 button...although I expect to have problems down the road, I think it is "fixed" for now....thanks for your feedback...it definately gave me the confidence to explore a little and get the LCD panel back on...I am like you though...really would like to know root cause...