Question about IBM ThinkPad T40 2373 Notebook

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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.

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  • 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?

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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

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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

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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.

Regards

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

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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

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Service Manual for IBM Thinkpad T40,

http://tim.id.au/laptops/thinkpad/T40-T40p-T41-T41p-T42-T42p.pdf

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

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