Question about IBM ThinkPad T40 2373 Notebook

5 Answers

IBM Thinkpad t40 black screen

I have an IBM Thinkpad t40 that has a black screen if I push down on the key board the screen comes on sometimes and stays on sometimes. Someone told me it might be an issue with a loose chip under the keyboard, can anyone assist. Thanks in advance.

Posted by on

  • 2 more comments 
  • Ben813 Apr 02, 2008

    thanks for the info i was trying the first suggestion and everything seemed ok, I have looked at the second suggestion more in depth and that seems to be my issue, I will try to do that in the next couple of days. Thanks to all for the help it is greatly appreciated.

  • mkoelby Apr 13, 2008

    I have almost the same problems. Sometimes the screen start to flicker and within seconds it goes black. But if I look carefully I can still see the desktop and all the windows, so its like the sceen is still on but only with 2 percent intensity. What will help in my situation? It is a loose cable?

  • Anonymous Oct 23, 2008

    freeze --> black screen --> alot of tries before startup again

  • missdarricka Oct 26, 2008

    i have the same exact problem with my thinkpad t40 the screen goes to blue and then it goes completley black. If I push down on my keyboard, the same thing happens I can get a screen for a minute then it goes back to black. Do I need the solder, or should i replace the entire motherboard?



5 Answers

  • 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.

  • Contributor
  • 2 Answers

Chips DO get loose and what you're experiencing is a common problem with IBM T40's. The solder that holds the graphics processor to the motherboard is cracked and no longre consistantly makes a good connection. This problem can only permanently be resolved with a new motherboard, or reflowing the solder of the GPU chip on the old one with a heat gun. Do a search for "thinkpad solder reflow" in any search engine.

Good luck.

Posted on Apr 01, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

  • Contributor
  • 2 Answers

First of all I would hook an external monitor to see if the graphics card is working, if you get a good screen on the ext. then you more than likely have a loose connection on the ribbon cable.

Posted on Apr 14, 2008

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 20 achievements.


    An expert that got 10 achievements.


    An expert that got 5 achievements.

  • IBM Master
  • 19,396 Answers

Chips dont get loose. what is out of place is your lcd ribbon cable. It is a flat cable connected on one side to lcd display, on the other to lcd display. If you keep pushing the keyboard to get screen on you can break more parts inside your laptop. open carefully the laptop and adjust lcd cable on connector. be careful not to break keyboard flat cable, speakers/pad ribbon cable etc. when lifting the keyboard. Servicing laptop requires attention and involves risk of damage if you do not have enough experience.


Posted on Mar 28, 2008

Ginko, sorry but your wrong. it definitly the GPU which always needs to be reflowed. Look up reflowing t40-41 gpu's. Also Ibooks have the same GPU chip set and are now running into the same problems. I hae contracts with 5 colleges in the area Western MA, I see them every day, this is a common problem..

Posted on Jun 13, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

I have the same problem with R50 and even no display on external monitor.. 2 lights r blinking 1 is power and other is processing.....
Can anybody help me........

Posted on Jan 25, 2010

1 Suggested Answer

  • 2 Answers


Hi there,
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.

Here's a link to this great service

Good luck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


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



Related Questions:

1 Answer

After changing out fan IBM think pad t40 screen goes black after windows xp screen finishes losding up

Wait Black Screen? AFTER you changed the fan... hmmm... I think I know what the problem is. Okay solution one; You might of hit a wire or cord in the computer when you changed out the fan. Two: You might have the virus 223, get it fixed and it should be going again! Hoped this helped! :D

Mar 25, 2013 | IBM ThinkPad T40 2373 Notebook

1 Answer

I have 2 ibm thinkpads t40, on one of the systems the lcd inverter and screen get no power but when i take the lcd and connect it to the 2nd ibm tkpad it works fine, What would be wrong with the one lap...

On the second Thinkpad laptop, that doesn't show a display with an LCD screen.
Plug a VGA monitor into the VGA port on the back of the laptop.
Hold the Fn key down, tap once on the F7 key (Toggle your display over to an external monitor)

Give the VGA monitor a few seconds to come on. (It's a VGA monitor)

Do you have a display on the external monitor? No? You May have a bad GPU then. (Graphics Processing Unit, )

Fix? Change out the motherboard. Possibly Ebay has one, dunno.

VGA monitor has a display? Then you may have a bad Inverter. The Inverter provides power for the LCD screen. Inverters go bad.

Are both Inverters the same? (Laptop to laptop)
BE SURE. The Inverter MUST match the LCD screen!
Check the numbers on both Inverters. If they are the same, switch the good one over to the 2nd laptop. See if you have display now.
Then it's the GPU.

Service Manual for IBM Thinkpad T40,

Copy and paste the above link into your Address bar. Press the Enter key. (I don't post direct links that you just click on. I want the asker to be able to see where the link takes them, by looking at the link. I feel it helps make the asker more comfortable with my solution, knowing I have their best interest in mind.

(If this link doesn't work for you, come back, and let me know)

Nov 20, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

My imb t40 laptop keep getting a black screen if it get moved or bumped a lil

Your issue is Board Flex... The t40/t41 have a split mid section and over time the lifting of the laptop from the base will flex the motherboard which can create a short in the layers of the board, it can also lift the heatsink from the graphics chip which will trigger the thermal controller,
put pressure on the palmrest area to the left side of the touchpad.. then attempt to move the laptop.. see if it stops the shutting down

Nov 15, 2009 | IBM ThinkPad T40 2373 Notebook

2 Answers

I pressed the reset button in my IBM thinkpad t40-2373, but now it's not booting neither in safe mode nor in normal mode. a black screen is coming.

This is a fairly common problem that is due to faulty capacitors on the main board. Since video card is built directly on motherboard. If you can get the screen to show or hook up to external monitor, then you can try to update the video drivers. Otherwise you may need new motherboard.

Oct 22, 2009 | IBM ThinkPad T40 2373 Notebook

2 Answers

IBM thinkpad turns on but screen stays black!!!!!

i had a t40 with similar issues. something with the video on board chip. can you boot to external monitor?

Jul 10, 2009 | IBM Computers & Internet

1 Answer

Ibm thinkpad t41 does not boot up...just black works

hehe...I used to have some problems
and then came up with the solution to install other OS such as linux, lindows or anything else
and then reinstal it with windows booting...and then it works, u can try it

Jun 21, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

Hit a key on T40, near Mouse and now screen is completely black

Sounds like you hit the Fn and another combination and dimmed the brightness down to black or turned off the light with another Fn combo. Reversing by pressing Fn and one of the keys that looks like a light should do the trick to get it back.

Jan 15, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

Boot problem

check it on bios whether the hard drive is detecting or not, if detecting then recover OS using recovery Cd

Nov 15, 2008 | IBM ThinkPad T40 2379 Notebook

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

6,150 people viewed this question

Ask a Question

Usually answered in minutes!

Top IBM Computers & Internet Experts


Level 3 Expert

13434 Answers

Les Dickinson
Les Dickinson

Level 3 Expert

18429 Answers

Alun Cox

Level 3 Expert

2679 Answers

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

Answer questions

Manuals & User Guides