Question about IBM ThinkPad T40 2373 Notebook

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Thinkpad T40 will not turn on if the adapter is connected but it will work fine with battery and without power connected. this is happening because by mistake some water was spilled on it, is there any work around to resolve this problem

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  • Qudsia Dec 18, 2007

    Thanks for your response, there is no problem with adapter it is able to charge the battery, I also tried other adapter still the problem remains. May be because of water some connection is damaged, if anyone can help me with this I will be grateful.


  • Anonymous Mar 12, 2008

    I have the exact same problem but I did not spill any water it just started happening. My Thinkpad T41 will not turn on if the adapter is connected but it will work fine with battery and without power connected. If I turn on with ac connected it loads onto the IBM screen and then nothing happens. You could just leave it for hours and the IBM screen remains it will not load into windows. I then have to switch it off by holding finger on the power button for six seconds, unplug the ac and then switch on and then it is fine. It loads onto IBM screen and then continues loading into windows. Once it has gone past the IBM screen I can plug the ac back in but not before hand, otherwise it will remain stuck on the IBM screen.

    Can anybody help me? Please.

  • 1825sam Mar 12, 2008

    I have exactly the same problem! Only I did not spill any water on mine. My Thinkpad T41 will not turn on if the ac adapter is connected but it will work fine with battery and without power connected.

    If I turn on with ac plugged in it loads up to the IBM screen but will not go any further, it will not load into windows. I then have to switch off buy holding power button for six seconds, then unplug the ac and switch back on. This time it loads the IBM screen like usual and then loads straight into windows, I can then plug the ac back in without any problems but not before hand. If I plug back in whilst still on the IBM screen it gets stuck on IBM screen.

    I have tried different ac power supplys but it's the same problem.

    Please Help!

    Thank you very much.

    Sincerely, Sam.

  • QuakeAngel Mar 29, 2008

    I have the same problem. It is not the psu. The powersupply is fine. the problem occurred after spilling water on my laptop. You can power on the laptop with the battery just fine but if you plug in the psu the screen goes black and locks the machine. Note you can charge the battery with the pc powered off and the ac power plugged in. I thought maybe the cmos caught an unstable state and held on to it so I unplugged the cmos battery and restarted. This did not fix the problem either. I also tried flashing the bios to see if that might clear the state. No help. It might be a blown cap on the motherboard so I am looking for that now.



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Yes. One possibility exists for you:

If the PSU (whatt you call adapter) has an internal fuse, you can HOPE it burned BEFORE any critical PSU components.


2 Open the PSU, and look for one (or more) glass tubes located somewhere on the board. The fuse will be about .5cm (1/4 inch) in diamiter, and have metal caps on each end. (Looks like a small glass pipe bomb :)

3 If the tube is black inside or has dusty material visible, it is most likely blown, and you may be saved.

4 Regardless, remove any/all fuses by prying one end up (or desoldering, if it is soldered) and take the fuse(s) out.

4 If you know what a VTVM is (and have one) check the "continuity" of the fuse(s). The continuity should be ZERO Ohms, on any (or best, the lowest) Ohm scale. If it is null (or no continuity) then the fuse is blown. If this does not make sense, take the fuse to a radio or TV repair shop and have them check.

5. If the fuse was bad, replace it (clean receptacles with fine sandpaper if they are black/burned/dusty, and VACUUM any metal particles away) and reassemble PSU.

6. PnP (Plug in and Pray) Wish you luck! Let me know!

Posted on Dec 14, 2007

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  • 13 Answers

This is my 2nd try to post this ('fixya' needs somebody to fixIT)
This web site
talks about your problem, and the solution, which requires a new fuse, new MOSFET, and the ability to solder itty ***** solder pads!

Posted on Feb 16, 2010


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