D620 screen not working

Question

Hello,   The build screen on my D620 lattitude has stopped working entirely after I connected an external monitor (Samsung Synmaster 203b.) It will not even turn on while the system is booting, it remains dead at all times now, also when no external monitor is attached. The system can still use the external display, which comes on when Windows XP starts. (Until then both internal and external screens are black.)   I spoke to Dell phone support, who had me press Fn+F8 a million times, but to now avail. I've tried deinstalling the Synmaster software and drivers, I've tried reinstalling the Nvidia software (I have the Nvidia Quadro 110). I've tried asking the Nvidia control panel to detect displays, but it will only detect the external screen. In fact, even after I deinstalled the external screen drivers, somehow Nvidia control panel still has the syncmaster display set up. It claims there is only one display attached to the computer. The Windows system hardware manager sees several displays, but Nvidia control panel sees only one.   I was told to by the phone support at Dell to look around on the internet and see if I could find some info about the problem myself. (Seriously.) But I haven't found any clue as to how the build-in display can be turned back on.   Has anyone had similar problems, and do anyone know how to force the internal display to turn on again? Any hint how to solve this problem would be appreciated.     --athorn.

Hans.B · Answer

The Windows system hardware manager sees several displays, but Nvidia control panel sees only one.

The above shows you didn't correctly remove the drivers of your external screen. Try removing the screen within Windows Device Manager.

athorn · Answer

Tanks for the reply.

I tried that, too. If I remove all installed screens and boot up the computer (without the external one attached), the computer boots but nothing ever comes on the screen. Mind you, not even the Dell logo comes up when the computer is just turned on. The backlight on the build in LCD does not come on, ever.

Then when the external display is attached again, the Windows device manager shows that there are 4 screens present: 3x default monitor and 1 plug and play monitor. The NVidia still has the Samsung as the only display.

I tried attaching another external display. The NVidia control panel correctly identified the other display as a NEC Multisync. It still only recognizes one display, though.

It seems to me that the NVidia graphics card has decided to turn off the build-in LCD permanently, then forgotten that it exists.

--Athorn.

Hans.B · Answer

If that is the case you might try and flash the video bios (if possible). But it might me risky. Another way is to contact Dell and let them pick it up and repair it. Good luck.

athorn · Answer

Yeah, I think its time for Dell to take a look at this problem, I'm pretty much stuck and I don't want to do anything risky with the computer. --Athorn

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