Where does a T20, T21, T22, T23 IBM Thinkpad LCD cable break?

Discussion in 'DIY Computers' started by Adrian C, Jul 15, 2008.

  1. Adrian C

    Adrian C Guest

    In the past year I've exploded to bits my faulty ex-trusty IBM T22
    laptop, ruined the original screen by attempting to change the $$ tube
    (specifically mangled up the rubber isolation bits over the solder
    joins), wasted $$ buying second hand inverter boards, wasted more buying
    an LCD cable from china that was for a higher res screen, and finally
    $$$ for a new screen and LCD cable.

    It was the cable that had failed ;-(

    OK, I'm interested. Where exactly does this filmwire cable fail?
    Symptoms were lack of light but graphics can be seen faintly.

    Picture here.
    <http://www.notebookoutlet.com.ar/prod_images/CABLE_TP_T20.jpg>
     
    Adrian C, Jul 15, 2008
    #1
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  2. All the failures I've had on other machines have been where it flexes
    when you open the lid. If you look with a magnifying glass, you may be
    able to see where the tracks have cracked.

    Not much help though, as they're not repairable in my experience.
     
    John Williamson, Jul 15, 2008
    #2
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  3. Adrian C

    Adrian C Guest

    Sorry, should have stated - the flexyprint is coated both sides with a
    woven mesh fabric so the tracks aren't viewable.
    Seems so, but as it's a common model I was hoping someone could pinpoint
    the weak spot so I can avoid whatever happening to the replacement cable :)
     
    Adrian C, Jul 15, 2008
    #3
  4. The only other way would be to check each track with a meter & find out
    which tracks have failed. You'll still not know *where*, though. They
    sometimes crack at the end of the strain relief, which is what the
    fabric is.
    Don't move the lid? ;-)

    I've an old Thinkpad 760 that needs very gentle treatment to get the
    flexible cable to connect, letting the backlight come on, after which it
    works fine until it gets breathed on. Then again, it *was* 10 years old
    before the failure happened. It still works fine as a desktop connected
    to a VGA monitor, though.
     
    John Williamson, Jul 15, 2008
    #4
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