Question about Sony VAIO VGN-A790 Notebook

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Blank (dark) notebook screen after hooking up digital ext monitor

HELP notebook screen went blank after installing a Samsung 245bw (dual display - XP) on a Sony VGN-A790, 17”, 1920x1200, ATI 600x (256MB) graphics card. Samsung 245bw (bad mistake) was replacing ViewSonic 21' (1600x1200) as dual monitor after the ViewSonic primary screen went out after 2 years.

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  • R AF Dec 09, 2008

    No, external monitor works, the notebook screen is actually very dark, not blank. I can see it at an angle. Sony VGN-A790 has an ATIX600 graphics card. ATI's website once had a statement about a known problem w this card of screens going blank when attaching a digital external monitor but they didn't have a fix. Sony ignores the problem. Occasionally the screen with start bright & normal & flicker after a few minutes & go blank/dark. Mine worked fine using a second analog ext monitor for a year. Everything stared when I connected a Sansumg digital 24" 245BW. I've tried everything except reformat the hard drive. Others have reported the same problem with this model???

  • R AF Dec 24, 2009

    any external monitor works. deleted all external monitors, drivers, etc & nothing. screen is actually dark. I can see it at an angle w desklamp. it's as if the digital monitor changed a voltage setting? ati had a brief web note stating connecting a digital monitor & screen going blank was a known problem without solution. tried everything except reformatting the hard drive, taking the case apart & checking screen connections, etc. could this be mechanical or voltage problem? Changing graphic cards? I hate to toss a 1920x1200 17?

  • R AF Dec 24, 2009

    any external monitor works. deleted all external monitors, drivers, etc & nothing. screen is actually dark. I can see it at an angle w desklamp. it's as if the digital monitor changed a voltage setting? ati had a brief web note stating connecting a digital monitor & screen going blank was a known problem without solution. tried everything except reformatting the hard drive, taking the case apart & checking screen connections, etc. could this be mechanical or voltage problem? Changing graphic cards? I hate to toss a 1920x1200 17?

  • Nicolas
    Nicolas May 11, 2010

    What happens if u cennect another monitor? is that monitor black to?

  • R AF Sep 09, 2012

    only the primary notebook mnitor is dark, all external monitors work

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  • Sony Master
  • 2,219 Answers

I notice a difference in the setup of the two monitors, have you installed the correct driver for the new screen?

Try F8 on startup to get into safe mode, this should allow you to use the default VGA screen, and to reset the correct monitor drivers.

Posted on Mar 07, 2015

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SOURCE: Sony VGN-A790, 17? 1920x1200, ATI 600x (256MB)

I HAVE A SAME SONY AND A SAME PROBLEM

Posted on Apr 22, 2010

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