Question about IBM ThinkPad T40 2373 Notebook

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IBM T40 2373 display cuts off.

My T40 display will cut off and go dark. I cannot get it back. Have hooked up to external monitor and it works fine. If I let it stay off a few minutes, it will work again. Sometimes it will cut off if I move the display, other times it will cut off for no reason.

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

Posted on Mar 10, 2009

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1 Answer

How do i switch to external monitor


Virtually all IBM and Lenovo ThinkPad and ThinkCenter laptops allow you to hook up an additional monitor or projector to the computer. When you add an external monitor or projector to your notebook, you can choose to view the display on the computer, on the external device, or on both the laptop and the external monitor or projector at the same time. Toggling between viewing devices is as simple as pressing a couple of keys on the keyboard.

Shut down the laptop. Plug the VGA monitor cable from the external monitor or projector into the blue VGA port on the back of the computer. Turn on the external monitor or projector first, and then the Lenovo laptop. Allow the notebook to boot into Windows normally. Press the "Fn" and "F7" keys at the same time to switch the display from the laptop to the external monitor or projector. Press the "Fn" and "F7" keys again to enable the display on both the laptop and the external display device. Press the "Fn" and "F7" keys again to display screen contents only on the laptop LCD. choose support you need http://www-307.ibm.com/pc/support/site.wss/MIGR-54305.html http://www-307.ibm.com/pc/support/site.wss/MIGR-4YQHUC.html enable tv out on thinkpad http://www-307.ibm.com/pc/support/site.wss/document.do?lndocid=MIGR-58625

Feb 13, 2013 | IBM Lenovo 3000 N200 PC Desktop

1 Answer

Latitude B130 screen works great then cuts out to complete black, works with external monitor


Are you sure that the display is not set for external monitor only? Also take bright flashlight and shine on the display. If you can see the images then the problem is with the back light and usually caused by a bad inverter. Some times you can get the back light or inverter bu most times it is easier and cheaper to replace the entire display.

Aug 20, 2012 | Dell LATITUDE Computers & Internet

1 Answer

I am try to hook my IBM R51 Thinkpad to an external monitor, but the monitor in standby mode.


You have to hold the Fn key down & press the F7 key, then release the Fn key.
This will activate the external display port, & you will get the display on the external monitor.

Jun 17, 2011 | IBM Computers & Internet

1 Answer

Lcd is very dim. after changing res a glow in the lower right corner starts then back to darkness. It works fine with my vga monitor.


Hi, display DIM cause by LCD or inverter Board (brightness controller). Might costly. Up to you either want to change it or not.
And using external monitor is best solution, I think so. =)

May 08, 2010 | IBM ThinkPad R51 Notebook

1 Answer

I want to use a NEC Multisync 1700V monitor as an external display for my Thinkpad T400. However I get no image when I hook up the laptop and change the display scheme to display on my laptop screen +...


The only I can think of is the resolution setting that your T400 is putting out that your NEC does not like andcannot display, look at the T42 resolution when the NEC is hooked up to it and try to set it to be the same in the T400.

Mar 25, 2010 | NEC MultiSync LCD1700V 17" Flat Panel LCD...

1 Answer

Dell ADAMO 13 w/Vista 64 Random power failure...goes dead in 1 second. Battery fully charged. Happened with external power and when on battery. I have latest BIOS v6.0. I ran pre-boot diagnostics...


If the power totally fails (i.e. power is cut off, LEDs turn off, fans stop, ... etc), then this more likely to be because of a short circuit developing in a failing semiconductor component, or a power supply problem.
However, if the laptop is still running & only the display on its LCD is cut off but the laptop itself stays powered on, then your laptop might be experiencing a failing screen inverter board, a failing screen backlight lamp, or a failing LCD screen cable.

TYPICAL INVERTER FAILURE SYMPTOMS

1. When you turn on the laptop, the screen lights up for a short period of time and then goes dark. You still can see an image but it is very dark, almost invisible and definitely not usable. When you restart the laptop, the screen lights up and then goes dark again. The laptop works fine with an external monitor.
2. Your laptop turns on but the screen remains dark all the time. You still can see a very dim image outline. The laptop works fine with an external monitor.
3. The laptop screen works fine for hours or even days, but sometimes it goes very dark as it mentioned above. When you restart the laptop, the screen works fine again.

Inverter failure symptoms are very similar to backlight lamp failure symptoms and in most cases you cannot tell which one is causing the problem until you replace either the inverter board or the backlight lamp. From my personal experience, inverter boards fail more often than backlight lamps. If you have to guess, replace the inverter first.

Feb 07, 2010 | Office Equipment & Supplies

1 Answer

HP DV 1000 screen goes dark after boot up. Plug in external monitor and it works fine. Toggle between internal and external and I can get the laptop monitor to come back on for a few min. Turning...


Your laptop's monitor went bad and needs to be replaced. I had the same problem on an IBM laptop I had. Replacing the monitor costs between $120-220.

Apr 15, 2009 | HP Pavilion DV5-1000US Laptop

1 Answer

Display cuts off. Shutdown computer and it comes back.


your lcd inverter circuit fail

replace ccfl bulb inverter pcb

you can buy it from market with part number

Mar 10, 2009 | IBM ThinkPad T40 2373 Notebook

1 Answer

Gateway 320S monitor is dark... external monitor works fine


Yes your back light has failed inside the lcd. That can be replaced.

Oct 28, 2008 | Gateway M305CRV Notebook

4 Answers

Laptop lcd display


sounds like your screen went out, if you need to access whats on your laptop real soon try hooking it up to a desktop monitor via rgb cavble.

Dec 13, 2007 | Computers & Internet

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