Question about IBM ThinkPad T23 2647 Notebook

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

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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

Posted on Sep 08, 2010


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The monitor screen is not bright enough to read information can I brighten or enhance? Is there a function key on the keyboard that will allow this?

Try holding the function key & tapping the Home button on keyboard:
Fn + Home - The computer display becomes brighter.

If this doesn't get it bright enough then perhaps the LCD backlight is dying. Easier to replace the whole screen than just the light.
Good luck.

Feb 20, 2013 | IBM ThinkPad Computers & Internet

1 Answer

The screen is almost all dark but i can some what see is there a key to brighten the screen

there should be a Fn key typically to the left of the space bar, its used in combination with a Sunshine icon key located near F10 key somewhere to adjust the screen brightness. , if you find the keys and pressing both Fn and "sunshine" do not help, you *may* have a burnt out backlight inverter on your laptop monitor. you can tell, if your windows is on the screen but there is No backlight, not dim , just no backlight.

Aug 29, 2010 | IBM ThinkPad T23 2647 Notebook

1 Answer

Where is volume control and how can you brighten screen that is so dark you can barly see.

for the brightness and contrasthold down the key that says "fn" or "fcn" and push the key that looks like a sun or a light bulb, or half filled in circle.
for the volume control hold the "fn" or "fcn" key and push the key that looks like a wave ")))" or an arrow with a + next to it.
each vendor seems to use different icons, but they all mean the same thing.

Apr 01, 2010 | IBM ThinkPad T21 Notebook

1 Answer

The screen has gone so dark I can hardly see it. I resume there are keys I can press to adjust this

Yes. ther is a Fn key in the last line. Keep this pressed and press the (looks like the sun) + key along with it. The brightness will increase and things should improve.

Nov 25, 2009 | IBM Lenovo ThinkPad X40 2371 Notebook

3 Answers

How to adjust the screen brightness form dark to bright

ok bottom left hand side of keyboard there is a key with fn on it hold this down along with other blue keys that have like little suns on them this is your brightness keys

Sep 06, 2009 | IBM Lenovo ThinkPad X40 2371 Notebook

1 Answer

Dark Screen on IBM ThinkPad R-31

try to install a vga monitor in the (db 15) Blue video conector...see if your laptop works fine...

then shoud be the inverter of your LCD that is not working anymore..the backlight is dead...that´s why the dark screen is driving you crazy!

see the model of your laptop and try to buy it on ebay..there are a lots of inverters there!
Good Luck!

Dec 04, 2008 | IBM ThinkPad R31 2656 Notebook

1 Answer

My screen brightness

Pressing the function and the brightness key simultaneously. it should brighten up the screen.

function key is located in the lower left of the keyboard and the brightness key is located on the upper right of the keyboard.

hope this helps.

Apr 05, 2008 | IBM ThinkPad T60 Notebook

1 Answer

Ibm thinkpad t20

Usually, hitting the 'F7" button while holding down the 'Fn' button (function button) will brighten your screen.

Also, if you're running on battery, to conserve battery power, most notebooks will dim the screen... you can override those settings by going into the control panel and into the power settings (easiest found on the old 'classic view').

If none of that works, your video display could be starting to go bad. Let us know how you fare and we'll go from there!

Good Luck!

Feb 21, 2008 | IBM ThinkPad T20 Notebook

2 Answers

Hi my IBM 2635-6AU, ThinkPad 380ED 26356AU screen is dark and i cant see

From what you are stating it seems like your backlight in your lcd needs to be replaced. Plug an external monitor up to your laptop. Press the fn & f key (the one with the picture of a monitor in it.) Your diplay should project to the monitor. Display is ok.....replace the backlight.

Hope this helps you

Oct 26, 2007 | IBM ThinkPad 380ED

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