Question about IBM ThinkPad T23 2647 Notebook

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Thinkpad t23 screen white

i have chnged the inverter, cable and screen but the problem still there
any solution

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Re: thinkpad t23 screen white - IBM ThinkPad T23 2647 Notebook PC Laptops

Change your lcd or inverter

Posted on Oct 24, 2007

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How to replace backlight on a ibm thinkpad t23

The backlight fault could be caused by a faulty inverter that supplies high voltage to the CCFL lamp OR the CCFL lamp could be faulty.
The inverter is located at the bottom of the LCD screen between the laptop's hinges behind the plastic bezel surrounding the screen,
The CCFL lamp is located on the bottom edge of the LCD screen behind a reflector that runs along the bottom edge of the LCD screen. The reflector is taped to the bottom edge of the screen.
To get access to the inverter, remove the plastic bezel.
To get access to the CCFL lamp, remove the screws that secures the hinges to the base, disconnect the video cable and inverter power leads from the motherboard.
Remove the plastic bezel, it may have double sided tape securing it to the LCD screen, BE CAREFUL you do not damage the glass on the LCD screen.
Remove the screws that fix the LCD to the lid.
Now you can get access to the reflector and CCFL lamp. Carefuly remove the tape as you will need it to fix the reflector back onto the LCD.

May 10, 2012 | IBM ThinkPad T23 Notebook

2 Answers

Where are lcd cable and inverter board located

The inverter board is located just below the LCD screen, the cable is located where the hindge is," left or right "

Apr 16, 2012 | IBM ThinkPad T23 2647 Notebook

1 Answer

My IBM Thinkpad screen has gone dark but I can still see a bit. Is there a key to brighten the screen?

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

Aug 29, 2010 | IBM ThinkPad T23 2647 Notebook

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Blank screen when turned on.sound is fine though.when i use external monitor it works on the external monitor.

Hi. I have 2 units of T23, 1 unit T22 and T30. All of them has the same problem as yours. 3 units has bad inverter and the other 1 has bad CFL. Inverters can be replaced but if you have bad CFL, it is better to replace LCD screen. If your problem is CFL, you will be able to see a very faint image on your LCD screen. If the LCD is completely black and you can't see anything, then it is an inverter problem.

Inverter is located below the LCD screen. You need to remove the LCD face plate to access the inverter. Please click here for the step-by-step instruction how to access the inverter or replace the LCD screen. Inverter and LCD are available at ebay.

Note: T23 has thin plastic parts that can be easily broken when disassembling.

Good Luck. Let me know further.

Jun 28, 2010 | IBM ThinkPad T23 2647 Notebook

1 Answer

T23 Ibm laptop no video

Hello !

Test with an external monitor. If it works, it is the display's backlight or inverter board.

If you were experiencing discoloration in the screen (pinkish lower light hues) before it failed, that would indicate a CCFL backlight issue. If the screen suddenly went dim on you rather than a slow degradation the inverter would be indicated.

Hope this helps.

May 08, 2010 | IBM ThinkPad T23 2647 Notebook

1 Answer

ThinkPad T23 white screen

1. your issue may be a bad hard, a damaged or loose flex cable to the LCD screen, a defective CPU (central processing unit, a cmos battery that needs replacement ( this is the battery that retains the information for the motherboard), a bad power supply regulator on the mother board.
2. this is just a few of the issue that have caused a white screen.
3. Laptops are mostly disposable and are usually good for 2to 3 years of service depending on the care taken.
Your friend probably thought he was helping by giving this to you to see if you could use it or part it out.
Not worth the work unless you are into PC repair or project work.

Mar 03, 2010 | IBM ThinkPad T23 2647 Notebook

1 Answer

When you power up the t23 2647 its vry very dark

Your inverter circuit board or its connectors/cables to display are fault. You should better take your laptop for repair.

Jan 13, 2009 | IBM ThinkPad T23 2647 Notebook

1 Answer



Since you have replaced the inverter and the unit works with an external monitor, then probably problems would be with:
  • CCF lamps (backlight);
  • inverter triggers and/or B+ supply.
Hope this be of initial help/idea. Pls post back how things turned up or should you need additional information. Good luck and kind regards. Thank you for using FixYa.

Nov 11, 2008 | IBM ThinkPad T23 2647 Notebook

3 Answers

How to repair ibm thinkpad t23 laptop screen no light

Yes you have no backlight. The screen is all dark but in the back you can barly see it. You inverter is bad on you thinkpad. You need to replace it. I have a IBM thinkpad 600e and i got one for $9.95 so they can be cheap. They are located under the lcd. When you open it up it is there or can see that it is attached to the light dimmer swicth so you will know that is it. Thats your problem

Sep 20, 2008 | IBM ThinkPad T23 2647 Notebook

1 Answer

White screen Ibm t 23

Have you tried switching the LCD monitor from teh good thinkpad to the ones with white screens? Sometimes its the actuall LCD.

Mar 16, 2008 | IBM ThinkPad T23 2647 Notebook

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