Question about IBM ThinkPad T40 2373 Notebook

2 Answers

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

Posted by on

  • 2 more comments 
  • 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.



2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points


    An expert that got 5 achievements.


    An expert who has written 50 answers of more than 400 characters.


    An expert whose answer got voted for 20 times.

  • Expert
  • 77 Answers

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

  • Level 1:

    An expert who has achieved level 1.


    An expert that has over 10 points.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 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


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

A 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
The service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

IBM ThinkPad T40, when connected to docking station the laptop will randomly stop working with USB connected items like mouse, keyboard, printer all connected to USB ports on docking station.

Try a power adapter with more amperage. When you connect a dock, the 3 amp adapter that comes with IBM laptops will not have enough power for lots of add-ons. You'll need the 4 amp adapter.

Oct 15, 2013 | IBM ThinkPad R51 Notebook

3 Answers

It won't turn on

Hi. Try theses simple steps:

Remove the Battery
Remove the AC Adapter
Press/hold down power button for 10 seconds
Plug AC Adapter in and turn the computer on
If the system doesn't turn on still then there's a problem with your motherboard. and it might need replacement.

Jun 06, 2010 | IBM ThinkPad T40 2373 Notebook

2 Answers

My IBM T40 boots to a black screen with the "z"(light at top to right of power.

Try these steps:

1. Remove battery and unplug AC adapter
2. Press power on button for 30 seconds or so (one min is also too)
3. Attach battery and plug into wall
4. Power "ON" as normal

If you are still getting the "Z" and a black screen then I would have the video card or hard drive looked at and replaced. Start with the video card and then look at the hard drive


Feb 17, 2010 | IBM ThinkPad T40 2373 Notebook

1 Answer

Power connector of T40 think pad loosen

if you think your adapter really works fine then you have a  motherboard issue.

May 28, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

Power connector of T40 think pad loosen

If you can't charge the battery and you know the battery is good, hook up just the ac adapter to verify that the laptop can turn on without the battery hooked up and if your laptop turns on then you know both are good.

At that point I would say since its not charging then it could be that the dc jack has some bad solder points on the bottom of it and need to be resoldered. Sometimes if the solder goes dry and cracks just a bit if can cause the adapter not to charge the battery.

If that doesnt fix the problem the the motheboard is bad and would need to be replaced.

Apr 09, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

My IBM Thinkpad T40 2723 will not boot up

The first thing to try is to unplug the power adapter from the computer then remove the battery. Then press down the power on button for a second or two. Put the battery back in and reconnect the power adapter and see if it boots. 

Mar 26, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

I have IBM LAPTOP thinkpad T43 SERIES. it was working tiil yesteraday. Suddenly it turns switch off. I thought its the problem with AC adapter. I bought a new one. It shows it turn it on but its switch...

It's not necessarily hardware related, can you boot into Bios? If you can try to boot info safe mode, that's F8 for most PCs. I would suspect something with your motherboard drivers, then again it could just be your battery. Not all laptops will operate with the battery out, there is some kind of failsafe to prevent overheating in some, because without a battery the power supply can be fried sometimes.

Hope this helps

Dec 04, 2008 | IBM ThinkPad T40 2373 Notebook

1 Answer

Battery indicator on even after turn off the laptop

Reset the battery.....remove battery from system...boot while your adapter is plugged on....shut down..reinstall the battery......

if this doesn't help..

go to Control Panel>>>>>>Power Options and view setting ..........what does the system do after being switched off options

keep me posted

Nov 17, 2008 | IBM ThinkPad T40 2373 Notebook

4 Answers

My IBM do not turn on.. IBM A21M..

check power ac adapter and batery if the batery is ok or charge do a test to the hard drive and memory ram loock on BIOS

Jan 03, 2008 | IBM ThinkPad A21m 2628 Notebook

1 Answer

IBM THinkpad T40 not charging

hi, since u say the wires were hot , that means -ev and +ev got shorted, that might have damaged the power supoply, or the polarity is reversed,if u can manage to open the adapter, then try replacing the fuse if present , and the filter capacitor. let me know

Jan 02, 2008 | IBM ThinkPad T40 2373 Notebook

Not finding what you are looking for?
IBM ThinkPad T40 2373 Notebook Logo

3,821 people viewed this question

Ask a Question

Usually answered in minutes!

Top IBM Computers & Internet Experts

Les Dickinson
Les Dickinson

Level 3 Expert

18417 Answers

Doctor PC
Doctor PC

Level 3 Expert

7733 Answers

Alun Cox

Level 3 Expert

2678 Answers

Are you an IBM Computer and Internet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides