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    Took LCD apart on T400, no more backlight?

    Discussion in 'Lenovo' started by chconline, Mar 26, 2011.

  1. chconline

    chconline Newbie

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    I got a Lenovo T400 and the backlight stopped working (LED). Anyone have any ideas?
     
    chconline, Mar 26, 2011
    #1
  2. Colonel O'Neill

    Colonel O'Neill Notebook Deity

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    I did the same disassembling my T400 upper half (latch was wonky). Reassembled it to find backlight non-operational. Apparently some motherboard component was fried. Repair people were quite incompetent (out of warranty, found a component-level repair store) and broke my original LCD (which wasn't actually broken) and melted part of my motherboard.
     
    Colonel O'Neill, Mar 26, 2011
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  3. MidnightSun

    MidnightSun Emodicon

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    Best bet would be to disassemble everything again, and make certain all the wires are connected as they should be, as indicated in the T400 Hardware Maintenance Manual. I remember one or two other users having the exact same issue with their Thinkpads, and both times, it was because they failed to connect all the wires.
     
    MidnightSun, Mar 26, 2011
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  4. chconline

    chconline Newbie

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    ^ Interesting tip. Got links to it? I only see one cable. There seems to be 2 connectors at the back of the LCD on the far right side but I don't recall anything going to that, nor can I find a cable.

    Does it happen to be the fuse or something? I googled around and some people said something about a fuse... know how and where to replace it?

    Thanks guys! As much as I wanted to upgrade to a T420, I just spent like $1250 on a new dSLR and flash (Getting new lens soon too) so really don't have much tech budget left lol.
     
    chconline, Mar 26, 2011
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  5. MidnightSun

    MidnightSun Emodicon

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    I do not have a T400, and I never took apart the screen assembly of my Thinkpad, so I can't say exactly.

    The T400's Hardware Maintenance Manual can be found here.
     
    MidnightSun, Mar 26, 2011
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  6. chconline

    chconline Newbie

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    Thanks. Yeah I followed that guide. I'll check the mobo connections. I didn't even access that part when taking it out though.
     
    chconline, Mar 26, 2011
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  7. vinuneuro

    vinuneuro Notebook Virtuoso

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    Post this on thinkpads.com. They're a lot a more hardware oriented.

    Also post this in the Hardware Components and Aftermarket Upgrades forum here.
     
    vinuneuro, Mar 26, 2011
    #7