Question about IBM ThinkPad T21 Notebook

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The display is dark but barely seeable already replaced the inverter externaql monitor works

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Its the backlight. Bit of a pain to replace but will work like new. About $10 off ebay and here a site with some great instructions http://www.lcdparts.net/howto/troubleshooting/LaptopCCFL1.aspx take your time and good luck...plz vote

Posted on Jul 05, 2010

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2 Answers

Why is there no display?


hi

can you plug in another monitor to the video plug on the side of your laptop?

if the monitor works but your laptop screen stays dark your laptop screen needs to be replaced .

If the monitor is also dark then the LCD screen is ok but the inverter needs to be replaced
25717570-m35oz4jvdfvvmght4a51n0jl-5-1.jpg lcd connect to laptop
25717570-m35oz4jvdfvvmght4a51n0jl-5-3.jpginverter
25717570-m35oz4jvdfvvmght4a51n0jl-5-10.jpglcd screen replacement
cheers

May 28, 2015 | Toshiba Computers & Internet

1 Answer

Gateway m280 notebook black screen.


Why did you replace the lcd inverter? Were you able to barely see icons on the desktop which is an indication that the lcd inverter is bad? If not, then you need to replace the lcd screen. If you could barely see the icons and you replaced the lcd inverter, then the inverter is bad. Just because the inverter is new does not mean it works. If the video shows on the external monitor, but you can't see anything on the laptop's screen even when you shine a flashlight on it then the lcd screen is bad.

Shine a flashlight on the dark screen to see if you barelysee the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can beany kind of monitor even the old big fat crt monitors as long as it has a vgacable to connect to your computer's vga port. If so that proves yourvideo card is ok. The video will show on most systems when you rebootwithout you having to do anything. Some systems will require you to hit the FN(Function key) + F1 thru F12. Hold down the FN key then hit the correctkey for displaying on the monitor (F1 thru F12). The correct key willnormally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad.
If you see no icons by shinning the flash lightand nothing shows on the external monitor, then most likely your video card isbad.

May 24, 2012 | Gateway Computers & Internet

1 Answer

Gateway laptop powers up but screen does not come up.


Why did you replace the lcd inverter? Were you able to barely see icons on the desktop which is an indication that the lcd inverter is bad? If not, then you need to replace the lcd screen. If you could barely see the icons and you replaced the lcd inverter, then the inverter is bad. Just because the inverter is new does not mean it works. If the video shows on the external monitor, but you can't see anything on the laptop's screen even when you shine a flashlight on it then the lcd screen is bad.

Shine a flashlight on the dark screen to see if you barely see the icons on the desktop. If so, then the LCD Inverter is bad.

Plug in an external monitor and see if the display shows up on it. It can be any kind of monitor even the old big fat crt monitors as long as it has a vga cable to connect to your computer's vga port. If so that proves your ideo card is ok. The video will show on most systems when you reboot without you having to do anything. Some systems will require you to hit the FN (Function key) + F1 thru F12. Hold down the FN key then hit the correct key for displaying on the monitor (F1 thru F12). The correct key will normally have CRT/LCD on it or it will have the icon of a display.

If you see no icons by shinning a flash light and the external monitor works,then your screen is bad.
If you see no icons by shinning the flash light and nothing shows on the external monitor, then most likely your video card is bad.

May 24, 2012 | Computers & Internet

1 Answer

The screen is very very dark on the compaq armada m700


its in neither its a seperate circuit board that connects the screen to the motherboard and its called an inverter
http://www.laptoprepair.co.uk/how-to-repair-backlight-inverter.htm
you will need the correct inverter board for your laptop and will need to find the relevant instructions on how to replace / repair it and take care and have lots of patience and persistence as it can be fiddly

Apr 18, 2009 | Compaq Armada M700 Notebook

1 Answer

Display went from extremely dark to complely black


Hello there.
I understand that your Notebook is not showing the display lights. To isolate the issue please do the following troubleshooting steps.

1) Check the display with external monitor. If the external monitor is showing the display then the problem is with the LCD screen. If the external monitor is not showing the display then the problem is with the display card.

2) If you have any torch light or a cell phone , try focusing the light on the LCD screen after the Notebook is powered on and check whether you are able to see the texts and images on the LCD. If you are able to see the images and texts then it is the problem of the LCD back-lights. The lights which glow at the back of the LCD panel are not working.

If your Notebook is under warranty HP will repair it free of cost.

Contact HP customer chat center for more information regarding the details of the repair and the procedure for sending the Notebook to HP in case of repair.

For contacting HP chat support click on this link or copy and paste it in address bar of a web browser.

http://welcome.hp.com/country/us/en/contact/chat_1.html

Feb 17, 2009 | HP Compaq Presario M2010US Notebook

2 Answers

Possible backlights not working


Hello friend,

Try this tech tip: try to connect external monitor to laptop and press FN key and F4 or F5, and if the monitor does not display motherboard need to be replace, if it does then lcd screen need to be replace

Dec 13, 2008 | Toshiba Satellite A55-S1063 Notebook

3 Answers

Monitor Barely readable and dark but display is correct


We have about 20 of these at work. Four of them went dark, to varying degrees, in the two years they were covered by warrantee, and were sent back to the factory for repairs. Since then, eleven more have gone dark. I finally got around to looking at them a few days ago. I have repaired five so far, and in every case it has been the same cause.
The capacitors on the inverter board are burning out. There are two 470uF, two 1500uF and a 1000uF that are not holding up.
Costs about 4 bucks for replacement parts at digikey; qtys and Part numbers are:
2 PN #493-1561-ND
1 PN #565-1664-ND
2 PN #P13124-ND
It takes about an hour, and minimal skill with a soldering iron to fix.

Jul 23, 2008 | ViewSonic VE710b 17" Flat Panel LCD...

1 Answer

Display is very dark


Dim screen is usually caused by a bad inverter board especially if you get video to external monitor. Usually cost $100-$200 depending on laptop.

Hope this helps!

Jun 11, 2008 | Toshiba Satellite M45-S331 Notebook

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