Question about IBM ThinkPad T40 2373 Notebook

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T40 Monitor Display

Display turns off automatically. What do you think is the problem? please reply thru my mail [] Thanks!

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Re: T40 Monitor Display

Hi i have a ibm thinkpad t40 , it boots to ibm and then its black email me asap

Posted on Feb 22, 2008

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Re: T40 Monitor Display

I assume you are running window XP or vista?
Go to
Start>Control Panel and look for Power Saver, or Screensaver options. There will be settings there for determining how long, if at all, your display will take to turn off.

Posted on Nov 15, 2007

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Horizontal thick bar lines on the bottom of laptop monitor

Take it back to the retailer. Unless it is more than a year old. The graphics chip or screen has failed.

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My display is damaged on my vaio laptop so I have to use an external monitor. How do I make the laptop go to the monitor BEFORE windows boots. My problem is I cannot make my computer boot up and I think I...

Usually, you can press a key combination to send the video to the VGA connector instead of the notebook display. The pictures on the internet of the keyboard are not very good - but it looks like pressing the "Fn" key (lower right between the "Ctrl" and "Windows Logo" keys) AND the ""F7" at the same time, should redirect the signal to a monitor connected to the VGA connector.Pressing the keys again will send the signal to the notebook display again.

I hope this helps. Please rate this reply - thanks!

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Need display hinges for ibm thinkpad t40 type 23734cu

i have a pair of hinges i took off my old t40 2373 . if you want them email me at umhhmm@ and i could send them to you.

Jun 09, 2010 | IBM ThinkPad T40 2373 Notebook

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Lcd screen stuck in external screen mode

How to use the function (Fn) keys on the keyboard - ThinkPad T40, T40p, T41, T41p, T42, T42p, T43, T43p

Switching the display output location.
Switch between the computer display and an external monitor. If an external monitor is attached, the computer output is displayed in the following three patterns by turns:
  • External monitor (CRT display)
  • Computer display and external monitor (LCD + CRT display)
  • Computer display (LCD)
  • For any operating system other than Windows 2000 or Windows XP, no additional procedure is needed. Just press Fn+F7.
  • This function is not supported if different desktop images are displayed on the computer display and the external monitor (the Extend desktop function).
  • This function does not work while a DVD movie or a video clip is playing.
To enable this function in Windows 2000 and Windows XP, the following procedure is needed:
  1. When you log on to Windows 2000 and Windows XP for the first time, press Fn + F7 and select a display-switching function in the Initial setup window. Since in Windows 2000 and Windows XP multiple users can log on to a single operating system by using different user IDs, each user needs to select the function in the initial setup window when logging on for the first time.
  2. If the Fn + F7 key combination have been assigned to a presentation scheme function, start Presentation Director, and change the settings.

Feb 28, 2010 | IBM ThinkPad T41 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

IBM T40 2373 display cuts off.

When it cuts out can you still see the display very faintly or does it just go completely black?

Mar 10, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

IBM T40 screen not working!!!! Please Help Me!!!!

check the display on external monitor, through the vga port of your laptop if the display is there then its the problem of your screen, some times this happen due to non working of the cable that gives display to the screen , its better check it by some technician

Nov 03, 2008 | IBM ThinkPad T40 2373 Notebook

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ASROCK i865 chipset mother board problem

This could be a memory chip. Try that, if you don't have any luck, then chances are your problem is with the motherboard. Take it to a shop to have it diagnosed.

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Display does not come on

hiu dear

try with external monitor.
and fix your memory
and try to clean it with rubber eraser


May 06, 2008 | IBM ThinkPad T40 2373 Notebook

2 Answers

My Ibm t49 the display shuts off as soon i as i boot up help

There are several possibilities within two categories:

SOFTWARE (you are using MS, so this is more likely)
HARDWARE these symptoms can be caused by bad battery and/or bad PSU (AC Power Supply Unit)

Software: You may have a virus, or may have damaged the NT kernel, or some critical software components by installing cheap games or bad SW. Read the recovery instructions on your XP CD to boot and run recovery and/or utilities that might repair the laptop OS. If you have no CD, try booting and hitting F6 key after BIOS screen... then explore the options there. Next, try booting and hitting F8 key after BIOS screen... then explore the options there.

If there are no problems repaired or evident in software, you should remove the battery, plug in the PSU and try booting. If all goes well, your battery is probably bad. If NOTHING happens, then your PSU is definitely bad (or the PSU cable/jack/connection to your computer is bad)

Conversely, remove the PSU and boot only with the battery. If it boots up (or goes farther than it did before) then the battery may be low/damaged BECAUSE the PSU is bad. If your laptop does not even open/get at least to BIOS screen, then the battery is dead. Try recharging overnight with laptop off but plugged into AC. If it is the same in the morning, replace the battery.

Both the battery and PSU can be checked with a VTVM, to compare voltage/output levels, with the ratings on the labels

Dec 06, 2007 | IBM ThinkPad T40 2373 Notebook

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