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Video problem Lost video on Dell M50 notebook. Shows up extremely dim on LCD, and no video with external monitor. Replaced video card and motherboard--no change. I can't see that it would be the LCD screen, since external video doesn't work at all either. Any ideas? Thanks!

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  • billrenn Aug 28, 2008

    Thanks Pyrhyc, I tried your suggestion (unhooked the LCD display and plugged into monitor) with all combinations of old and new video cards & motherboards.

    The results are the same--the monitor displays clearly during POST and initial Windows XP login splash screen, and the Windows welcome sound, and then the screen turns black.

    There is a bluish tint to everything, with both video cards, for some reason. I can get into setup menus and it'll stay on indefinitely. Still stumped! Any further thoughts?

    Thanks very much for your help.


  • chasrn Dec 12, 2008

    my laptop starts up noise and runs flickers and then the screen goes black
    then try again and get vertical lines


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Generally this type of problem is the video card, however, it's extremely rare, but sometimes a screen malfunction will override the video out causing the appearance of a bad card. To check this, disconnect the screen, and try the external monitor. If the external works properly, then it's the screen.

Posted on Aug 13, 2008

  • Ryan Rogers
    Ryan Rogers Aug 28, 2008

    Wow, this is a tough one without having it in front of me. The only other thing I can suggest to check would be the screen inverter. Possibly the inverter is bad or shorting and cancelling out the video card. Change out the inverter and see what happens. If this doesn't work, then I can only suggest taking it to a shop for diagnosis. Stay away from the Geek Squad, those idiots won't be able to fix it, their mainly software oriented, and although they talk a good game (baffle with BS), don't know jack when it comes to component hardware issues, unless it's plug and play, and then it's still 50/50.

  • Ryan Rogers
    Ryan Rogers Aug 28, 2008

    One more thing, have you tried a different cable/ribbon on the screen? It's just a thought, it's kind of silly to get stumped over aa cable, but it happens. It seems that the cable is one of the most overlooked items in repairing screen problems. I'm guilty of overlooking it.

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