Permanent Line On LCD Monitor
I got quite a number of emails asked whether one permanent vertical or horizontal line can be repair or not. The line is usually a white line. My answer to them is still “No” if you have confirm that there is no dry contacts between the LCD panel screen and the LCD controller board. If it is a dry contact, you can know it by pressing on the board area that produced the line (vertical or horizontal). The line problem in LCD Monitors are most probably cause by a defective LCD driver IC and there is no way we could replace the IC.
If i come across permanent line on LCD Monitor, i will send back the Monitor to customers (normally customer don’t want to repair because a used or a new lcd panel are very costly) or offer them a good price to buy over so that i could salvage the Main board and power/inverter board and in some models i could have their power pack too for future use!
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Sam C Chao
September 23, 2008 at 1:15 am
If its one single or multiple DISTINCT lines, the lcd panel is defective.
If its a horizontal or vertical band of lines (lcd panels display image in 8 or more vertical bands), the driver (aka T-Con) board is bad. Look for cold solder joints on the T-con board.
There was a Toshiba service bulletin about their LCD. They suggest heating up the ribbon cable connection on the LCD display with a soldering iron through a wax paper until the line disappears. Doesn't work everytime but well worth a try.
I have found cleaning/reseating the LVDS Cable and rubbing along the edge of the panel where the line occurs sometimes help.
admin
September 23, 2008 at 9:38 am
Well, what can i say more Sam-it was just fantastic that you share out the good tips!
Jestine
Faizul
March 31, 2009 at 10:11 am
Mr. Jestine I have no idea about dry contact but in my case, I can see the line blinking and dissapear for few seconds whenever I move the laptop lid.
admin
March 31, 2009 at 10:50 pm
Hi Faizul,
It could be a dry contact and you need to open up the lcd cover and test it out by applying some pressure on it.
Jestine
Kazi Baki
April 2, 2009 at 1:18 pm
Dear Sir,
I have lcd monitor Philips 17'' model 170s, its pop up Monitor setup windows freequently,pls advice how to slove this
thanks
admin
April 2, 2009 at 10:30 pm
Hi Kazi,
It could either a bad MCU or eeprom data already corrupted.
Jestine
Stelios Stylianou
April 11, 2009 at 12:43 am
Greetings from Cyprus. Any help and advise you can give me to the problem described herebelow, will be greatly appreciated.
Had a Power Supply problem with a 5-month old Toshiba 57 inch LCD TV model 57Z3030DB.
The red light in the front of the set started flashing once every second. The problem could have been created from very small water spillage.
I changed the Bridge rectifier diode near one of the power connectors and the TV worked. HOWEVER two vertical lines about 12cm each appeared in the centre of the screen changing colour according to the picture colour. The lines are irregular, one has a small branch andeven a small circle attached to it.
I wonder if the problem is the rectifier bridge diode and whether if I change the entire Power Supply Board, will solve this problem.
Also if it is a problem that you faced before as few local technicians that I contacted have never faced this problem before.
Thank you in anticipation of any advise that you can give me.
admin
April 13, 2009 at 11:04 pm
Hi Stelios,
If the power supply has all the outputs then suspect lcd panel problem. I came across lots of lcd monitor panel fault like just the one you have described.
Jestine
Dondon
August 1, 2009 at 9:27 am
Dear Sir,
Good Morning.
I have Toshiba Satellite (Laptop) 17" Wide - now two vertical lines appeared (left side of the screen) - the lines are yellow & light blue.
Yellow line appeared about 3 weeks already suddenly light blue appeared last night.
I read from previous comment (below) - suggesting heating up the ribbon cable connection on the LCD display with soldering iron through a wax paper until line disappears.
Thanks & Regards,
Don2
admin
August 1, 2009 at 9:13 pm
Hi Don,
The vertical line usually is the problem with the lcd panel and i have not try using the method. If you get good result from the method, i would be glad to hear from you. Have a good day!
Jestine
TonyUK
August 13, 2009 at 7:59 am
Hi, I have a 14.1" ACER Laptop and It has suddenly developed white lines going horizontally , only about 2mm each but its right in the centre so very annoying. It started with one and has gone up to 4 in a matter of about two weeks.
My question is, has the screen had it or is it worth me trying the solder/wax paper trick?
Many thanks
admin
August 13, 2009 at 11:04 pm
Hi Tony,
It seems that your laptop LCD panel need replacement.
Jestine
Yazan
October 16, 2009 at 5:12 am
Hi,
I bought a 42 inches LCD (Sharp AQUOS) few months ago. It has been working great. Yesterday, a vertical violet/Pink line about an inch appeared suddenly from the top to the bottom of the screen when I was watching a movie, it remains on all channels.
When I switched off the monitor by removing the wire from electricity plug for about an hour,the line disappears but it reappears again after watching for few hours.I don't know what to do. The TV is under warranty, I'm afraid that they will fix it and the problem will arise again so what's the problem and should I ask for a new TV?
admin
October 16, 2009 at 7:22 am
Hi Yazan,
It seems like there was an intermittent connection problem in the LCD panel. Guess you might need to send the TV back fro warrant claim. Usually they will have to replace the LCD panel. Have a good day!
Jestine
Magnus
December 18, 2009 at 10:27 am
The real problem with the single line is dust inside your monitor. How many people have been ripped off by this simple fact of Life would amaze us all. Simply vacuum or blow your monitor's backside with compressed air and I bet you the line goes away. I have seen it on no less than 5 times completely correct the problem no computer geek necessary, no complicated computer explanations, just dust interfering with the performance of your LCD minitor. Go ahead, give it a try.
admin
December 22, 2009 at 11:20 am
HI Magnus,
Thanks for sharing!
Jestine
kat
January 31, 2010 at 10:37 pm
Hi Jestine,
I need to understand what that line white appeared on my gateway lcd monitor 23" .
Tell me please how i repaired or the way to fix it.
the line is white and sometime a little red.
here some pic :
http://img714.yfrog.com/i/dsci0319.jpg/
http://img692.yfrog.com/i/dsci0323j.jpg/
admin
February 3, 2010 at 8:18 pm
HI Kat,
It is the contact or the internal lcd driver ic have problem. Try press the top part of the lcd where the line is and see if there is any different or not. If no different then it may be the ic or the tcp package have problem. If the line gone, then it is contact problem.
Jestine
Jai
July 19, 2010 at 3:54 am
Hello im Jay from Kuala Lumpur Malaysia
I have Acer Aspire 5620 laptop with me since after i sold it to my friend something happen to it.
I did't know what the problem it have actually??
I already using external LCD to check it...and afterwhile about 1-2min after win7 boot and windows
screen appears i click on any icon on the desktop suddently screen became unsuall it appear weird text like matrix with unknown characters and after restart it still happen these times showing other colors & stuff.
Then i tried enter ACER ENERGY boot menu & reset it to default value & save default profile then restart it again
After that i unplugged the external LCD and whola it work good...after 10-30min same problem
accour again!
No display even power is on
I use Ctrl+Alt+F10 to reset their BIOS to default
& after restart the display okay again after using it abt 10-30min same thing happen once again!
Because of previous action my win7 crashing so i re-install new window but nothing happen during installation only after few hour or less same scennarious happen again!
What the problem generate by these laptop??
Is it lcd inverter
Is it lcd itself
Or nVDIA 7200 graphic chipset problem?
Please assist me my sifoo?
Please reply me at matrixsolution.faizal@gmail.com
admin
July 19, 2010 at 10:31 pm
Hi JAI,
Since you have used another LCD monitor on this laptop and the display still the same then most probably the mainboard or the graphic chipset have problem. If the inverter have problem the display will become dim and won't cause such problem as what you have described. As for the part, sorry i do not have information about the chipset. One more thing, make sure the supply voltages to the mainboard are good and stable.
Jestine
izza
August 24, 2010 at 2:35 am
i have problem with my LCD, i just change the new one, but still have the same problem... its has red line at the bottom which is blinking..
its does not effect the top part..
before this, the blinking part is all over the LCD, i change the LCD for rm300 but because the LCD still under warranty, i ask the new LCD change...
but i'm worry!
i scared that it is not the LCD problem.. because
my power cord is a little bit loose...
my laptop model is acer aspire 4920...
i used this laptop for about two years...
can u tell me, the problem is due to overheating or the power cord? i don't want to keep change my LCD...
plz answer me at my email.. thank u...
admin
August 24, 2010 at 6:47 am
HI Izza,
Most of the line problems are due to bad LCD Panel. If there is no dry joints or bad connection then most probably the problem is in the lcd panel.
Jestine
ganeshkumar!
September 16, 2010 at 1:19 pm
dear sir!
i'm ganeshkumar, please i had pink vertical line on my LCD samsung monitor(17"). sir its happen sometime before this line color are green just today is changed what can i do sir please reply me sir ..........
admin
September 16, 2010 at 9:14 pm
HI Ganesh,
Try press the top area of the vertical line section to see if it had a dry contact or permanent. If it is permanent, then you have to replace the lcd panel.
Jestine
vyayoy
September 18, 2010 at 2:01 am
..hello there.. I am having problems with my laptop monitor.. i'm searching for possible solutions when I came across this site.. I have HP presario CQ40-108TU .. I already updated my display driver.. nothing.. last night, I noticed a light flickering or jumping of the displays on my laptop screen.. something like a hiccup.. Then a noticeable horizontal line on the very edge(at the top) of the screen appeared.. the line is colored violet and sometimes changes to color blue..please help me.. i don't know what to do.. I am afraid my laptop would crash or something..
admin
September 18, 2010 at 7:35 am
Hi Vyayoy,
If the line is permanent then you need to replace the lcd panel. The line would not cause your laptop to crash.
Jestine
Dave
December 23, 2010 at 4:11 pm
I have a 40" sharp aquos with a 4" white verticle line in it.I took it apart and can see it is where the ribbon connects from the bottom circuit board to the screen.There was a little bit where you could see it had heated up on the board and ribbon but can't see damage.Any suggestions? Thankx
admin
December 24, 2010 at 2:32 am
Hi Dave,
Usually you can't see the damage because the problem could be one of the lcd driver ic have problem. If there is a single line, we can suspect the ribbon cable or dry joints problem but if there is a 4" gap of vertical line then the lcd driver ic could be the cause of the problem. There is no way to replace such an ic.
Jestine
Dave
December 26, 2010 at 6:21 pm
Thanks jestine,
I took it apart and it almost looks like it may have gotten wet on the screen and run down on that bottom circut board.I can see where the damage is on that board under the tv and it is like a 4" white line up the screen.I have a tv repair guy I know looking at it but it dosnt sound good from what I've heard.
Mercurio
April 20, 2011 at 11:21 am
Jestine, the line is vague blue. If I tap the display, the line becomes more or less bright. It became virtually invisible at one point.
What is your suggestion?
admin
April 21, 2011 at 3:20 am
Hi Mercurio,
It seems like there is a loose contact in the tcp package. Try open the lcd and gently press on the edge where the line is located.
Jestine
David
June 5, 2011 at 8:35 am
Hey Justin!
I have a VA712B Viewsonic lcd fp monitor that has the same perminent thin lines going vertical (green,purple & red) down the r.s. of the screen. Just got through replacing the (generic brand)external psu 12v adaptor for not powering up & was successful at getting it to power back up but now i'm stuck with those lines. If I replace the screen alone will it fix the problem, or will I have to replace the invertor board also?
You mentioned about the "Driver IC" being bad is what led me to believe that was my problem.
Oh! I am a member of your newsletter & have contacted you before a very long time ago on a Dell monitor which by the way I fixed it as well & working fine.
Thank's!
David
admin
June 6, 2011 at 9:47 am
Hi David,
Those permanent lines are cause by bad LCD panel and is not related to inverter. Replacing the lcd panel should solve the problem.
Jestine
ALFATRAZI
June 20, 2011 at 5:40 pm
Hello to you, Dear Sir
I hope you have any advice for an issue I have with a three year old Gateway W350 laptop
A few months back I was getting blue screens and shut off, on the screen I would get error memory dump messages, two different friends who claim to know told me the video card or graphics card was giving up, mostly due to heat, I took lid off. plugged a fan uner it at all times, so it runs cooler now, no more blue screens, but yesterday I had one single yellow line appear vertically on the right side, sometimes light blue, and today it disappeared, my friend says laptop video card is about to go, would you have any advice for me please? I live in a dusty environment could it be just dirt? Is there anything to save my computer?
admin
June 21, 2011 at 9:05 am
HI Alfatrazi,
There may be a loose contact. Try gently press/hold the affected area to see if the line will go off or not. If it can go off then there is a loose contact and you may need to think of a way to apply some pressure to the lcd screen internally so that the vertical line will not appear again.
Jestine
zonker
July 18, 2011 at 12:16 pm
Greetings from Greece. I have a car in-dash Player with LCD screen that suddenly started showing a permanent thin (one pixel)horizontal white line near the top. I dismantled the unit, checked all ribbon connectors, and there doesn't seem to be any dry joints. Do you think this line indicates a problem with the screen (INNOLUX AT070TN07)or with the driving circuit that is external to the screen? I am thinking of buying a new screen and replacing it, but at almost $100 for a replacement one, I would like to be pretty sure where the problem lies before spending my money. Any advice would surely be appreciated.
admin
July 18, 2011 at 9:21 pm
HI Zonker,
It can be the driving circuit or the lcd panel. If the driving circuit is a separate board from the lcd panel then there is a chance that you can replace the driving circuit and retest. From experience, more than 90% of horizontal/vertical line problem were caused bay bad LCD panel.
Jestine
Kazer
July 27, 2011 at 2:41 am
Hi,
Recently there is this long vertical line that appeared.The first time it appeared it was blinking white and yellow.After moving the screen about,it disappeared.
But yesterday the line appeared at the same place,this time it's just plain white and moving my screen around doesn't fix it.Any ideas would be appreciated,thanks!
admin
July 27, 2011 at 5:19 am
HI Kazer,
If the line is permanent now then most likely the lcd panel have problem.
Jestine
Andrei
October 22, 2011 at 2:35 pm
Hi Jestine,
This morning I had a problem with my Dell D630 LCD (1440x900, made by LG). I have closed the lid to move the laptop in another room and after I opened it, I saw a one pixel horizontal line in the middle of the display. After searching on the internet for solutions, I tried the pressure one. The line dissapeared the moment I touched the LCD in that point.
One solution that I think it is good to solve this kind of problem is to remove the display's plastic bezel and put paper between the LCD frame (the metal one, that holds the components togheter) and the LCD. This way, there will be constant pressure on the dry contact. I choose paper because it is very thin and you can put several small pieces of paper one on top of the other until there is some pressure applied.
This method haven't been tested, but in case that my problem appears again (hopefully not), I will try it and post results.
Have a nice day!
Andrei
October 22, 2011 at 7:07 pm
Hello again! I just finished sticking paper between the LCD metal frame and LCD. It worked very well for 10 minutes, but I hope it will last for 2-3 years.
admin
October 24, 2011 at 12:34 pm
HI Andrei,
Hopefully it will last.
Jestine
Jagermeister
March 30, 2012 at 2:26 pm
Is it possible to purchase only the LCD screen and not the backlight or the rest of the monitor? If so, where?
Jestine Yong
April 1, 2012 at 9:42 am
HI Jager,
Usually it comes with the backlight. I do not know of any source that only sell the lcd panel. Try email Luca at info@lavinci.it to see if he sell it separately.
Jestine
ALyex
April 26, 2012 at 6:50 am
Hi Justine.. my vertical line problem is fixed by pressure .. so there is NOT inverter trouble.I already disassemble lcd from pannel of my laptop and cleaning electrical strips and check the various connection and no success.So ( i immagine you know that ) the problem of the fail contact is on lcd's sides of his structure.How to fix it ? May I disassemble more stuff at this point to make a permanently connection.?Thanks a lot .. bye ..
Jestine Yong
April 27, 2012 at 4:32 am
Hi Alyex,
This confirmed that there is contact problem. I guess you may need to place in a thick rubber in between the panel and the cover unless if you could find the T-shape metal that is connected to solder gun to reheat the joint.
Jestine
Jasmine
June 19, 2012 at 5:21 am
Hello Sir,
I am observing some black lines on my SAMSUNG LCD Screen scince last a few days. Ond of them is growing day by day. Please kindly help me.
Thank you!
Jestine Yong
June 19, 2012 at 8:09 am
Hi Jasmine,
If yours is LCD Monitor then the LCD panel is the cause of the problem.
Jestine
Kab
July 11, 2012 at 4:39 am
Dear Sir
Multiple Colour line appear on my LCD on all screen. Kindly tell me the solution of this.
Thanks
Jestine Yong
July 11, 2012 at 5:07 am
Hi Kab,
If the problem is in LCD Monitor then chances is high the lcd panel have problem. It can't be repaired and you need to replace it.
jestine
nadz
September 6, 2012 at 12:40 pm
i have a problem with my monitor DELL 19" there is 9 thin horizontal line how to fix it? is there any problem in capacitor or any components of electronics,,,
please need your help thank you
Jestine Yong
September 6, 2012 at 9:03 pm
Hi nadz,
Usually the problem would be a bad lcd panel and it can't be repaired.
Jestine
Amir
November 8, 2012 at 9:58 am
hello ,
i have the same promplem on my 22'' Samsung lcd therer is a thin white permanent line .. Can it be Fixed ?
Jestine Yong
November 8, 2012 at 8:35 pm
Hi Amir,
If the line is permanent it can't be fixed. You need to replace the lcd panel.
Jestine
Elias Filho
July 14, 2015 at 5:53 pm
Hello Friend.
My lc ( LN32G ) this 3 black line vertically. What do I do
Elias Son
Jestine Yong
July 15, 2015 at 9:29 am
HI Elias,
Usually is due to bad LCD Panel and can't repair it. .Before you need to confirm that all the LVDS cable are properly connected.
Jestine
Jestine
Suresh Kumar Patnaik
October 10, 2016 at 9:32 pm
I have Zebronics 17" LCD Monitor. I have noticed dust inside the screen. Previously the monitor was in perfect condition. I opened the monitor and removed the frame and by tilting the lcd screen, I removed the dust by blowing. After fixing it suddenly I noticed a thin line and after few centimeters and white line of 2mm thickness appeared. Please suggest what to do ?
Jestine Yong
October 11, 2016 at 10:30 am
Hi Suresh,
Probably the Tab bonding already break. Tab bonding is very fragile. If it is broken then you need to replace the LCD screen.
Jestine
Jestine