No Backlight on LED screen

Discussion in 'VAIO / Sony' started by nebage, Sep 27, 2011.

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  1. NeoVo5

    NeoVo5 Notebook Enthusiast

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    Any help available at all? I've tried using a multimeter but all appears OK..?
     
  2. Timborixos

    Timborixos Newbie

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    Hey first time posting here, i would like to thank ngvuanh and all the other guys from the start of the topic, you helped a lot. Thanks!
     
  3. Nitewing

    Nitewing Newbie

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    I have a sony vaio sve14a27cxh and am having the same problem. Can you Identify my fuse for me? I put pics in the folder for laptop photos... cant figure out how to get them on here using my phone...
     
  4. Nitewing

    Nitewing Newbie

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  5. WMCM76

    WMCM76 Newbie

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    I must say that this forum and this particular post have been a great find. Having already sent 1 replacement screen back and parcelling the 2nd up to go back tomorrow, I thought I'd try 1 last Google search :)
    I have a Sony Vaio VPCEA4S1E (PCG-61211M) with the same problem. New screen in, display like you're watching it through a pair of dark sunglasses.
    Fairly confident that this will be a fuse issue. If I post up mobo images, could someone please identify which component is at fault?
    Also as a complete novice, what do I need to do to fix it? Solder a wire across it or something else?

    ***UPDATE***
    OK I found a video on YouTube (even though it's up incorrectly as PCG-6121M). It identifies the fuse as F15.
    I've dismantled the laptop and solder blobbed the fuse. Trying to get a micro fuse is as rare as hens teeth. I had no alternative. Anyway the screen now works.
    However... having solder blobbed on the motherboard, is the laptop now a fire risk?
     
    Last edited: Oct 26, 2015
  6. Bigmaxy

    Bigmaxy Newbie

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    Hi. I have a Sony Vaio Duo 11 SVD112A1SW that had a cracked screen, I have replaced the screen with one from another Vaio Duo 11 but the backlight is not working. Can anyone identify a fuse amongst these pictures?

    Cheers.
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  7. WMCM76

    WMCM76 Newbie

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    It will be something labelled "F" (5 or 15) near to where the display cable is connected to the board. I don't see anything for this model on the web so it's a shot in the dark.
     
  8. Bigmaxy

    Bigmaxy Newbie

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    Thanks WMCM76. There does not seem to be much info about the Duo 11 available. The only devices with anything labeled on them have the letter "T". I've checked them and if they are fuses they appear to test ok. Unfortunately the PCB doesn't seem to have anything to provide guidance either.
    My next line of thought was to try to figure out the pinouts of the LVDS and see if I could trace the backlight power back on the board. Possibly impossible if they are a multi-layer board. Don't know.
     
  9. WMCM76

    WMCM76 Newbie

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    Mine was a multilayer board and the fuse was on the underside. I put a voltmeter on either side to check continuity before doing anything. I was also lucky enough to stumble on a YouTube video for my precise model that told me exactly what F number I was looking for.
    The one thing they all share in common seems to be that they're all located near to the monitor connector on the board.
    I wasn't able to get a fuse to replace mine. Instead I tinned a fine piece of copper wire and soldered it on top. It's not ideal, but will still blow before setting fire to the house :)
     
  10. chikoo711

    chikoo711 Newbie

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    hello, please heeeeeelp I have sony vaio model SVF142c1ww I replaced screen and battery was on after that backlight are not working i can see the diplay but without backlight tried another screen its also like that so please which fuse i must bridge and on which side is located ???
     
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