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IBM T40 Screen goes off after few seconds

I have IBM T40. When switched on it shows IBM logo and after few seconds it goes blank, completely blank though power stays on. Power stays on but nothing comes up on screen after showing logo. Plz helpppppppp. Cheers

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Re: IBM T40 Screen goes off after few seconds

Well, being a techy I figured out this problem but not a fix. I have 3 T40 laptops with the same issue. One of them if you don't touch it it works fine. I probed around thinking the same are you , memory swaps and such but the problem seems to lie either on the motherboard or the CPU socket. When pressing my finger directly on the CPU it immidiatly freezes after making video glitches and garbage. It seems that the sockets become either faulty over time or the mother board has bad connections. I've tried swapping CPU's so that's not the issue. depending how much your CPU fan screws are tight will probably affect it's functionality. I just wish there was a real fix for it but it seems either mechanical or cold solder joints.

Posted on Sep 30, 2009

Re: IBM T40 Screen goes off after few seconds - PC Laptops

No luck when i tried your solution..

Posted on Jun 16, 2008

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Re: IBM T40 Screen goes off after few seconds

Here's a couple of things to try:
Power down and remove the battery. Leave it out until you are done with the following procedures. Remove the memory modules and put only one back in. Try to power up. If that works, replace the other one and power up. If that works, you're fixed!
If not, try to power up in safe mode and see what happens. If it comes up, try running diagnostics on the HDD. If that fails, try reseating the hard drive.

Let me know how you're coming along on this. May be able to come up with more ideas, if needed.

If you need any additional information, please feel free to ask. If this information has assisted you in the resolution of you problem, please return here to give my assistance an appropriate final rating. If this information has answered your question and/or lead to a resolution, please rate it as "Fixya!".
Thank you, and have a super day!

Posted on Nov 26, 2007

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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

What's your problem?I was working on the computer when it wnt blank, no screen, no power.

I think unfortunately you press the stand by mode key ,watch the half round moon logo switch. Please press FN+F4(lenovo or IBM)Actually it depends model to model.

I don't know ,your model of the laptop.If the problem ios same remove ac power cable / battery .After 40 secends press the on off switch .
Now insert battery and press power button.
Contract for any further instruction.
Hope this helps.

Oct 29, 2011 | 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

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

3 Answers

Laptop LCD display problem

The backlight is the light bult that illuminates the screen. Before it finally goes out completely it will turn your screen a pink color on startup (and then usually become brighter and the pink fades). It is also possible that the backlight, also called a Cold Cathode Flourescent Light, CCFL, died an immediate death. But usually they take a while and signal with the "PINKNESS" first. If you found that your computer is working just fine connected to an external monitor (and you moved the base of your laptop around while connected to the monitor to be sure and left the computer on for a long time) then you have verified that the screen is the problem. It is usually two things: (1) the inverter, a circuit board that increases the voltage to supply the LCD which eats around 700 volts (yeah baby); or (2) the backlight itself. The first problem is a relatively easy and inexpensive fix. You can find how to replace an inverter by downloading the Hardware Maintenance Manual for the T40, T41, etc., from IBM/Lenovo's site. Replacing the backlight itself, a bulb that is like a strand of speghetti and even more delicate, is a tougher job. I would suggest purchasing a replacement screen in that event rather than replacing the backlight yourself. (The HMM probably does not show you how to replace the backlight/CCFL as it is a potentially dangerous job.) That suggestion assumes you can find a cost-effective replacement screen and do not mind opening the TP and putting the new screen in. At least look at the HMM to see what is involved. Good luck.

Apr 07, 2009 | IBM ThinkPad T42 Notebook

1 Answer

White blank screen

i think it is a some kind of virus in ur system try going in safe mode and let me know if still problem is there otherwise u have to reset ur OS to get rid of that and do protect ur system with good internet security like pc cillin or norton

restore OS simple procedure pls backup ur data first

When you first turn on the laptop and see the Acer logo screen, hold the ALT key and press the F10 key (you need to do this before the Acer logo disappears).
if there is a window showing in the taskbar blank

Mar 05, 2009 | Acer Aspire 4720 Notebook

1 Answer

When i switch on the my thinkpad it starts to boot up then the screen goes blank the battery light goes orange and and flashes and it makes a cranking noise.

Is the Battery making the cranking noise? If so the battery is telling you the battery is dying. I have a IBM ThinkPad 380Z and when on the charger it makes a beeeeep noise and goes off and on for almost the entire day and then stops and keeps a solid orange battery light on.
Try booting without battery

Feb 23, 2009 | IBM ThinkPad T40 2373 Notebook

3 Answers

IBM T40 Laptop screen goes black, will not come back

First of all, you have to check whether you can see video signal with surrounding light tilting the screen.
If you can see dim image, all you have to do is replace back-light inverter or fix it. Usually, the fuse is open and you can connect it by simple soldering.
If you can't see dim image, it is another problems.
Give it a try.

Dec 09, 2008 | IBM ThinkPad T40 2373 Notebook

1 Answer

T40 Problem

motherboard get faulty
give heat by blower on the chipset
it will get ok

Nov 28, 2008 | IBM ThinkPad T40 2373 Notebook

1 Answer

Acer Aspire 5100 will not start right

It seems your hard drive has corupted.
This sucks, all you have to do is push ALT F10 and then go through the reseting menu, you will loose everything on there though except the original data.

Jun 24, 2008 | Acer Aspire 5100-5033 Notebook

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