I own a Dell XPS M1530 laptop. For the past month, when the computer is turned on, the screen would remain black. The computer, however, works when attached to a secondary monitor. The backlight is working fine, considering the monitor will occasionally work, but then stop working when the computer is restarted.
I managed to fix it once by making sure the LCD cable was secure, but the problem has returned. As mentioned earlier, the problem has (2-3 times) happened after powering down the computer, whereas before the computer was powered down, it would work normally.
My thoughts are that I either have a defective LCD cable or video card. What do you think?
It's likely it's the screen - but nVidia screwed up the engineering of these video chips, so there's an outside chance it's the video chip (meaning you'd need a mainboard). It may be worth trying a new LCD, since they're not that expensive - if that doesn't fix it, it's not worth replacing the mainboard in this system. They're all faulty - all of these nVidia chips - and another mainboard will simply fail again in the future.