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    HDMI / VGA adaptor used to work, now stopped

    Discussion in 'Hardware Components and Aftermarket Upgrades' started by Topscore, Mar 20, 2015.

  1. Topscore

    Topscore Newbie

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    Hi,

    I use an HDMI/VGA convertor to connect my laptop to a classroom projector. This worked fine for a long time however it now has suddenly stopped completely. My colleague has exactly the same laptop as me (hardware-wise, software / driver settings may be slightly different) and it still works fine for him. I've been battling this all day to try and get it work with no joy. Here's what I know:
    • The HDMI port on the laptop is working. If I connect the laptop to a TV via HDMI it works OK.
    • The HMDI / VGA adaptor is working, as it works fine on my colleagues laptop.
    • The projector is working, as if I connect via DVI is works fine.
    • All leads have been tested on alternate equipment and work fine.
    And here's what I've tried:
    • Rollback Intel HD Graphics driver and also nVidia GeForce driver to earlier versions
    • Connecting to TV then sleeping the laptop, then plugging in the adaptor (as suggested elsewhere on this forum)
    • All manner of different resolutions
    • Starting the laptop with projector plugged in, not plugged in, projector on/off all possible combinations
    • Clone / extend etc. all potential duplication settings
    The best I can manage is to get the projector display to briefly show black - but generally the projector is just not detected as an available display.

    I'm posting here in the hope someone might have a new suggestion - many hours of Googling and testing has not helped so far.

    Many thanks in advance!
     
    Topscore, Mar 20, 2015
    #1
  2. StormJumper

    StormJumper Notebook Virtuoso

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    First off we have no idea what kinda laptop your referring to start finding a diagnosis setup for it?
     
    StormJumper, Mar 20, 2015
    #2
  3. Topscore

    Topscore Newbie

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    Sorry - it's a custom build on a Clevo chassis, i7 3840QM 2.8GHz with a Intel HD Graphics 4000 chip and a nVidia GeForce GTX 670MX both of which are currently running latest drivers (I did try rolling back with no joy). Windows 7.
     
    Topscore, Mar 20, 2015
    #3
  4. TomJGX

    TomJGX I HATE BGA!

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    It's the HDMI CEC codec screwing things up from the looks of it ( I heard of a similar case last week).. Not too sure if there is a way to fix this... Google it..
     
    TomJGX, Mar 22, 2015
    #4
  5. alexhawker

    alexhawker Spent Gladiator

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    What driver version is your colleague running?
     
    alexhawker, Mar 22, 2015
    #5