Question about IBM ThinkPad T20 2647 Notebook

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IBM T20 2647 loaded with Microsoft XP pro

The display size of my IBM T20 is way too large for my 14" LCD screen. How do I reduce this display size to fit into LCD size? Or is the video card bad?

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You should be able to right click on your desktop and select properties and on the settings tab select the screen resolution to atleast 800 x 600, if you cannot and only 640 x 480 is available, the the driver may be corrupt for you graphics card. Go to the link below and download the driver for your graphics from here and install:- Go to my computer>properties>hardware tab>device manager and look in the list at graphics adapters, right click on it and select update driver and the downloaded driver should be found, you may see an exclamation mark at the graphics line, this wiil mean there is no driver for the card and by right clicking again on it and select update driver should sort it, reboot pc and see if you can alter the screen resolution.

Posted on Jun 17, 2007


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Posted on Jan 02, 2017


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How do i reduce the text and icons on my laptop display/screen

Assuming you have a Windows system:
  1. First make sure you don't have the type size and icons set to a large size. Right click on your Desktop and choose 'Personalize'. Then in the lower left choose 'Display'. Make sure that you have selected 100% as the size of text and icons. If you have, proceed to #2
  2. Make sure that you are displaying at the native resolution on your laptop. If Windows doesn't have the right software drivers (instructions) for the display it will use some generic drivers which will work but will make everything appear large and potentially slightly fuzzy. Verify the potential resolution of your laptop with HP by looking up the model on their website and then checking the screen resolution. Then right click on your Desktop and pick 'Screen Resolution' from the context menu. Verify that the resolution is the same as the HP's listed resolution. If not, change it to match. If you can't change it to match that means you don't have the correct video card driver installed on your notebook. Go to #3
  3. To install the correct video driver for your notebook, go to the HP Support site and click on 'Detect my product'. This will install some HP software that will recognize your system and load the appropriate updated software drivers for all components. You want to specifically find 'video drivers' but it will probably be OK to let others found by the website be installed. Install the video drivers and then if the screen isn't displaying at the correct manufacturer resolution, go back and repeat the instructions in step 2 to manually set it.
That should get everything displaying at the correct size.
Drivers Downloads

Feb 18, 2015 | HP Pavilion Computers & Internet

1 Answer

I have an ibm t43 and the top of the screen is glitching to where it has white lines on it. How do i fix it?

Problem may be;

1) Video Cable:

A) May have a loose connection on the motherboard side, or back of LCD screen side.

B) May be damaged.

2) Display Assembly:

Specifically the screen Inverter, or LCD screen.

An LCD screen does not produce light.

It needs an additional light source.
A Backlight is the additional light source.

A Backlight (Present technology) can be a CCFL, (Or dual CCFL's), or a series of LED lights.

The IBM T43 series of Notebook PC's uses a single CCFL.

Cold Cathode Fluorescent Lamp.
Similar to Fluorescent lighting used in homes, and businesses, but on a MUCH smaller scale.

(Average size of bulb is;
1) Width: 2mm. {Slightly more than 1/16th of an Inch }
2) Length: A little shorter than the LCD screen is in height.

Basic example, )

The screen Inverter converts power from the laptop for the LCD screen, and Backlight.

90 PERCENT OF THE TIME the fault is the screen Inverter.

Primer over.

Example of Inverter,

The thin plastic 'frame' in front of your LCD screen, is the LCD Bezel.

(Goes by several names, depends on manufacturer.
Display Bezel, Display Panel Bezel, LCD Bezel, LCD Front Bezel, etc.)

Behind it, and located at the bottom of the LCD screen, is the Inverter.

IBM ThinkPad T43 series of Notebook PC > Service Manual (Free),

Go down to the line that begins with ThinkPad T20. (T20 in blue)
Scroll across, click on - T43

[ This is a PDF file. The computer you are using now has Adobe Reader on it, which uses PDF files.

After you click on the file name { T43 } it may take up to 30 seconds, before the first page comes up ]

A) ALL power removed. Remove the AC adapter (Charger) and Battery.

B) It would be BEST, if you would wear an ESD wrist strap. Have it's alligator clip connected to a good ground source.
(Electro Static Discharge)

Average price of an ESD wrist strap is $3 to $6.
One example,

C) Use a multi-compartment container for the various screws you will remove.
Label each compartment for the area the screw/s come out of.

SOME screws look VERY similar to other screws. Do NOT mix them up.

1) Check the connection of the Video Cable TO the motherboard, and TO the back of the LCD screen.

The connection MAY look to be plugged in tightly, but in reality it is not.
Physically make sure the cable is plugged in tightly.
(Especially at back of LCD screen )

You have to remove the Display Assembly from the laptop, in order to properly access the video cable connection, at the back of the LCD screen,

PDF file page number, and service manual actual page number, Do Not match. When I refer to a page, the reference will be to the PDF file page number.

Go to Page 121 in the Service Manual, for units that have a 14.1 Inch LCD screen.
Page 126 for 15 Inch.

Motherboard Connection:
Laptop open, looking at the LCD screen; The cables on the Left are Video. The cables on the right are for the Wireless Antenna.

LCD screen connection:
Disassembly of LCD Assembly starts on Page 154.
Page 167 shows the video cable, and connection.
LCD flat panel cable = FPC. Also known as Video Cable.

On Page 121 you will see a component removal list, listed in order of removal.
You can click on an underlined subject, to go directly to the chapter that deals with it

To remove the LCD Assembly, (Display Assembly), you have to
remove the Keyboard, then Keyboard Bezel. (Palm Rest)

Once the Keyboard Bezel is removed you have direct access to the motherboard connection side, of the LCD cable. (Video Cable, or for IBM - FPC)

Check the connection. Tight or loose, you still have to check the connection at the back of the LCD screen. (LCD Panel)

1a) Check for damage to the LCD cable.
If there is obvious damage to the outside sheath of the cable, there may be damage to the tiny wires inside the cable.

Even if there isn't obvious signs of damage, the tiny wires inside may be stretched/broken.

Use a multimeter set to Ohms, and check the continuity of the wires, inside the LCD cable.
{ An economical, yet good enough for this test multimeter, can be purchased for as little as $8 to $12. Available in a multitude of stores. An auto parts store is but one example. Analog or digital is fine }

2) LCD cable checks out it's on to the screen Inverter.
Make sure this small circuit board isn't damaged. (Pulled wire/s)

To test a screen Inverter requires a sensitive multimeter. Read fairly expensive,

Something the average consumer does not have.
For this reason, the ease of accessing it to replace, and the usual low cost, (Compare to an LCD screen), the unit is usually just replaced.

Parts changing I know, but you have to use what is available to you.

Or see what a computer repair shop will charge to test the unit.

An LCD screen, and a screen Inverter are a MATCHED unit!
When replacing make SURE you get the right part ]

3) Screen Inverter checks out it's a bad LCD screen.

NO, your graphics chipset is FINE.

For additional questions, or clarifications, please post in a Comment.


Apr 27, 2012 | IBM ThinkPad T43 Notebook

1 Answer

How do you turn the screen on? the computer is making noise, but the screen is black.

Try attaching an external monitor to the laptop & see if you could get any display on it. If this is successful, then you might have either a faulty LCD cable or screen inverter board.
The LCD cable transfers data signal from the motherboard & video card to the LCD screen. It also supplies high voltage DC power to the screen inverter board. The screen inverter board works as a power supply for the backlight lamp mounted inside the LCD screen. It converts low voltage DC power to high voltage AC power needed for the backlight lamp

Sep 12, 2010 | IBM ThinkPad T20 2647 Notebook

1 Answer

IBM T20 screen bad, IBM i1400 screen good-Compatible?

Yes, it's possible, but unless you are a qualified laptop technician, I recommend that you take both computers to a qualified technician, to get the job done properly and safely and correctly.

Dec 19, 2009 | IBM ThinkPad T20 2647 Notebook

1 Answer

IBM T20-How can I find out if the screen or the backlight

connect an external monitor and check...if display siganl is being sent to the monitor...
to check if ur inverter board or backlite is out u need to open the screen and check that out...

Dec 18, 2009 | IBM ThinkPad T20 2647 Notebook

1 Answer

Ibm laptop 2647 series23 the power is on no monitor screen lite

You most likely have a defective screen - a defective inverter or a CCFL lamp or simply the video cable needs reseating. After reseating the video cable and the problem is still there then :- To determine if you have a LCD screen or video card problem, read this and follow the instructions. Defective CCFL backlight, it may have the following symptom: Screen flashs on red/pink and off. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickering on and off. All these symptoms indicate that the LCD backlight lamp (CCFL Lamp) has reached the end of the life and all you need to do is replacing the CCFL lamp Connect an external monitor to your laptop and power it up, if you see the normal Windows images then the video card and laptop is OK and the problem is definitely the backlight. Dim image and/or dark display on the laptop's LCD screen indicates a faulty LCD backlight and it could be the inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out or burnt out, most likely this is the case. The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills. Check out for parts, repair service and DIY info.

Jun 04, 2009 | IBM ThinkPad T20 2647 Notebook

2 Answers

How can I reduce the text shown on a 15'' ibm g78 monitor

well you can try
control panel
accessibilty option
pick a task
configure window to work for you
pick one of those

Feb 17, 2009 | IBM G78 (Refurbished) (Black) 17 in.CRT...

1 Answer

Laptop to TV Hook Up

Reduce the video resolution on your "input".

Oct 09, 2008 | Computers & Internet

1 Answer

IBM Thinkpad T20

try to check your settings on the display properties ->screen saver->monitor power. make sure the power is turn off never.

Jun 30, 2008 | IBM ThinkPad T20 2647 Notebook

1 Answer

Ibm t20 no LCD backlight

while the T20 is on and manifesting the dim display....

1. try to slowly close the lid (but not totally closing it) and then pulling it back to its original position slowly. Tell me if the light goes back.

if by doing that action the backlight lights up, you are most likely faced with a Flex cable problem. You might need to buy this from ebay. (dim display problem in T20 series is very common these days due to wear and tear of the flex cable)

2. Also try to use a pen to turn on and off the limit switch that triggers the backlight. This is located above the keyboard below the lcd. See what happens.

Apr 10, 2008 | IBM ThinkPad T20 2647 Notebook

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