Question about IBM ThinkPad T20 2647 Notebook

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T42 Turns on for a split second then turns off.

Good evening, Yesterday my IBM T42 unexpectedly turned itself off. Since then every time I try to turn it on it comes on for a split second before switching off again.
I have been trying to to turn it on with the powercord in. 
I recall that it did not make the warnign noise before it switched off to say the battery was dead, it just turned off.

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  • msdehder Nov 20, 2008

    yes it comes on then truns off in a split second

  • msdehder Nov 20, 2008

    yes the light lights come on as normal, the amber and green lights, the only thing that doesnt light up is the circle symbol with what looks like a z in it.

    I tried changing the fuse on the powercord with no luck

  • comment
    comment May 11, 2010

    I need more detail.. I understand the compuer starts up momentarily, and then shuts off.. THis is not the question I need answered,, The question is about the lights ( illuminated ICONS ) only.. Here is the question again..

    When you plug in the AC, does the amber charge light ( ICON ) come on? And, is the AC ( green light (ICON) ) on?

    Also, if you lightly jiggle ( side to side slowly ) the AC power cord where it enters the computer, do you get any lights or not.. You may have to try to hold the position of a few seconds while checking this.. Have you checked where the AC cord from the wall plugs into the power module?

    At this point, I'm not concerned whether the computer itself starts or not, just the lights ( lit icons)

  • comment
    comment May 11, 2010

    When you plug in the AC, does the amber charge light come on? And is the AC ( green light ) on?



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OK. What you can do is to take out the battery then the HDD the plug in the unit and try to start it
If is doing the same thing definitely you got a bad SODIMM. If you have two of them try removing one and another to see which one is bad.
When you take out the HDD and memory remember to dismantle battery first and disconect the main.
This is the way to avoid damaging your memory and HDD

Posted on Nov 21, 2008


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