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Lcd display how much is a new backlight for a laptop display and how much is the fine to fix it?

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Re: lcd display


Posted on Dec 15, 2007

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Re: lcd display

Depending on the brand and model of you PC, a new backlight should fun from $5-$20. It normally shold not take more than an hour to replace it.
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, please rate it as "Fixya".
Thanks you, and have a super day!

Posted on Nov 14, 2007

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Why are all the lights on LCD screen on?

How to troubleshoot and fix video problems
Here are some tips and tricks for troubleshooting and fixing laptop video problems. Video issues are very common within portable computers and with the following tips you should be able to detect and eliminate basic laptop video problems.
Laptop LCD screen has a faint image.

Look at the LCD screen very closely and check if you can see a faint image on the screen. It's possible that the LCD lid close switch stuck in the "closed" position and the backlight stays off even when you open the LCD screen or turn on the laptop. The switch turns off the backlight when you close the LCD display to save the laptop battery power. Check the LCD lid close switch. Usually it is a small plastic pin located close to the LCD hinges. Try to tap on the switch a few times to turn on the backlight. If after tapping on the LCD lid close switch the backlight stays on, you fixed the problem.
It is also possible that after tapping on the LCD lid close switch the backlight works fine, you see a normal video on the screen for some time and then the backlight turns itself off again. In this case I would blame the FL inverter board. Try to reseat cables on both end of the FL inverter to make a better contact between the cables and the FL inverter board. If it doesn't help I would try to replace the FL inverter board.
Laptop LCD screen is solid white color.
Most likely it is just a bad connection between the LCD display and the system board. I would try reseating the video cable connector on the back of the LCD screen first and check if it fixes the problem. After that I would try reseating the video cable connector on the system board. I would also try reseating cables if there is no video on the LCD screen at all.
Try to connect the LCD screen to an external monitor. If the external video is fine, you have a problem with the LCD screen or the LCD video cable. You can try to fix the problem by reseating the video cable on the back of the LCD and on the system board.
If you see the same garbled video output on the external monitor most likely it is not the LCD screen problem. In this case the system board (with onboard video) is bad or the video card is bad.

Jun 30, 2015 | PC Laptops

1 Answer

My screen has a pinkish overtone, when I restart everything looks normal for a few seconds after I log into my name and then it goes red again. Everything works fine, but it pretty much hurts my eyes.

That means the backlight on your LCD display is on its last legs. I say that but I have had laptops with the pink screen that lasted like that for over a year. Or, it might go dark tomorrow. It is not the inverter, which is an easy fix. Only a replacement of the backlight (a flourescent tube built into the display panel) will fix it. So Replace the backlight at repair shops...THANK YOU

Aug 13, 2013 | ASUS PC Laptops

1 Answer

The model of my laptop is TOSHIBA SATELLITE U400 MODEL NO. PSU40C-DW208C the problem is the backlight of the LCD is built in and no power on it, thats why i cannot totally see because its very dim color,...


It may not be the backlight, it may be the screen inverter which is a reasonable replacememnt. As a laptop specialist in my town, I always order both the screen inverter and the LCD unless both are sold combined.

Fixing a backlight is one of the most difficult laptop repairs possible to attempt. 1. You're not going to fix it. 2. In replacing it you'll have to do such delicate hand-soldering that even I don't attempt it any more and I'm VERY good with my hands.

So, friend, please order a new LCD and screen inverter and you'll be just fine after having someone spend about 1 hour replacing both.

Kind Regards,


May 20, 2011 | Toshiba PC Laptops

1 Answer

Why would my HP laptop screen go black?

A few reasons
1) backlight burnt out (or broken)
2) loose or broken cable AND backlight burnt out (or broken)
3) Failed GPU (probably integrated into the motherboard on that model)
4) failed motherboard (same issue above)

Check by plugging in an external monitor- if you get a signal, your LCD need a new backlight (or inverter, an easy fix under $15 USD)).

Cheapest solution is to simply replace the backlight, but you'll have to diassemble the entire laptop lid/cover AND the LCD to get to the backlight at the bottom. (this could be under $20 USD to do). Often similar sized LCD's with different part numbers will work fine in different laptops (meaning, a 14" LCD mady by samsung or LG will be compatible with almost any same 14" LCD made by either, especially if it comes WITH the inverter!)...


Sep 04, 2010 | HP Pavilion dv2000t Notebook

1 Answer

Satellite M105 S322 Display very Dim. The PC works fine with external monitor but the LCD display is dim and cannot see anything on the screen

You have lost your backlight which is a thin long bulb built into the bottom of the screen itself. You have the option of getting the backlight by itself and rebuilding the screen or buying a new screen assembly and changing that out. Below is the service guide to change the screen.

Below is a general guide for display problems....

Oct 27, 2009 | PC Laptops

1 Answer

Sony vaio vgn nr160e laptop - no display (intermittent). Attached monitor shows display fine and laptop works fine. Screen used to flicker intermittently (last few days).

You may have a defective CCFL backlight, it may have the following symptom: Screen flashes on and off or displays reddish pink hue. Picture stays on in red and slowly be come normal. Picture flickering with dim display or appear black. Picture flickers 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 replace the CCFL lamp.
To determine if the video card or the LCD is faulty, connect an external monitor to your laptop and power the monitor up first then the laptop, 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. It could be a faulty inverter that supplies high voltage to the CCFL lamp or it is the CCLF lamp is nearly burnt out, usually the CCFL lamp fails before the inverter.
The inverter can be replaced easily but the CCLF lamp is more time consuming and requires soldering skills.
Check out LCD Parts for service, parts, and DIY info Use this link to their WEB site: -

Oct 20, 2009 | Sony VAIO VGN-NR160ET Notebook

2 Answers

I have a Dell laptop D505. The laptop powers up but the screen display is very dim. I can't see the image on the monitor. I've tried to manually increase the color/brightness button and nothing changes. ...

Sounds like your inverter or your backlight is failing. The inverter is an easy repair, the backlight can be replaced but it involves taking the LCD panel apart, The backlight comes installed on new screens. I can include a service manual below and possibly a generic guide to backlight replacement....

Sep 23, 2009 | Dell Latitude D505 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

2 Answers

New laptop lcd display not working

check the panel to make sure the panels are the same model number there are more then one part number for gateway lcds for your model and if your laptop uses the xga screen and your not replacing with the correct panel then you will get the problem you are seeing now.even thought the inverter and back light are the same the panel are very differant.

Feb 18, 2009 | Gateway MT6451 Notebook

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