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Hello, I have a LCD TV. MITSUBISHI Mod. #LT-40133, the right side of the tv. when the tv get hot (after 30 or 40 minutes) show vertical lines that cover almost all the right side. We replaced the Logic board, but the problem persist. Additional thing: if you hit the back cover in the right side, the tv get fix for some minutes (5 or 10),after that, the problem come back.

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  • jaduan2405 May 31, 2011

    thanks for you help.

  • jaduan2405 Jun 08, 2011

    Hello again, I was wrong, is not the right side, is the left side, any way do you believe the problem is the backlight inverter board?, because in this side is none.



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Your logic board isn't at fault.

You need to replace the backlight inverter. It sounds like it is overheating...then causing your LCD panel to over heat...causing the line problems!

The backlight inverter is located in the exact location you are speaking of, so this must be at fault.

HERE is your exact part you need AND it is ONSALE!

Thank you and best of luck!~

Posted on May 26, 2011

  • Andrew P.
    Andrew P. Jun 08, 2011

    Yes the problem is the backlight inverter board. Depending on the tv the inverter can be left or right side.

    Thank you!



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Hello, I have a LCD TV. MITSUBISHI Mod. #LT-40133, the left side of the tv. when the tv get hot (after 30 or 40 minutes) show vertical lines that cover almost all the left side. We replaced the Logic...

The fault can be detected from your problem post itself. When you hit at the back of your TV the fault disappeares, means there is some soldering loose or socket loose inside it. Normally, these faults will come appear after the set will got heated. The soldering points will get loose contacted, after some time, especially the solerings to the terminals of components, which will heat up durin working. This is normal fault to all kind of TVs. Your TV no also sufferes to this fault.
To determine which board and component is loosley contacted, just open your TV, and hit the top of components [verylightly with some non conductive material like plastic scale or so] , while the TV is working. Switch on your TV after opening its back cover, and wait for some time, say 20 minutes or so, and do this. From this you can determine the dry solered component. After detecting it, switch off the TV and take the board out, turn it upside down and resolder the suspected soldering points by applying a little more solder; without making any solder bridge in between adjecent soldering points.
This will surely resolve your TV's problem. If you want anymore assistance, please feel free to get me by Fixya.
If you want to get me, please post your comments after 9 hours from now, otherwise the post will go to an other, and I can't answer it. OK.

Jun 08, 2011 | Televison & Video

1 Answer

There are 3 vertical lines on either side of the screen. How can I get rid of them?

This can be a defective T-con module or Control module. Best to have it diagnosed by your local service center. It's to costly to play a guessing game.

Nov 27, 2010 | Mitsubishi LT-40133 40 in. LCD HDTV

1 Answer

Mitsubishi 65" LCD (1080P, DLP) keeps shutting down until it "warms up". After shutting down the power led flashes yellow for a minute or so, at which time I power it up again. This cycle repeats 1 to 4...

Try connecting the TV directly to a different wall outlet and check. If the issue persists, try power resetting the TV. Turn Off the TV and remove the power plug from the wall outlet for 1 minute and reconnect it and check the operation. If the issue persists, then the TV may require service.

Jul 27, 2010 | Mitsubishi LT-40133 40 in. LCD HDTV

1 Answer

I have a vertical line across my screen from top to bottom about 2mm thick about 2 inches from the right side of my mitsubishi lt-40133. how do i fix this?

Vertical lines more likely to be caused by bad T-CON board, you need to check the connections between the T-CON board and the main logic board, it can possibly be the main logic board also.
Please see my basic troubleshooting guide:
Parts: try or Ebay

Jun 25, 2010 | Mitsubishi LT-40133 40 in. LCD HDTV

1 Answer

Vertical lines atarting about 2 from left side and are approx 1' wide ussualy multi colored but sometimes brown intermitten sometimes as little as five minutes and sometimes as long as 1/2 an hour usually...

That is bad sign of the bad LCD panel itself, but you can try replacing the LCD driver board first. The new LCD panel will be very EXPENSIVE! It will get worst as time goes by.

Nov 11, 2009 | Mitsubishi LT-40133 40 in. LCD HDTV

1 Answer

Mitsubishi 40" TV, LT-40134 Vertical lines on left side of screen

I've got the same TV with the same problem. Sometimes by moving it on the stand the lines will go away but it only sometimes temporarily fixes the problem. For a while it seemed like it needed to heat up to go away but that is not the case. It seems like there is a bad connection somewhere but i cant seem to find it. One day, one thing will fix it, then the next day it wont do the trick. It gets very irritating.

Oct 09, 2009 | Mitsubishi LT-40133 40 in. LCD HDTV

1 Answer

Red vertical line down right side of the screen


I think your TV have a trouble inside lcd panel
the controller board contains driver IC. Deffective driver IC can cause of line display.

Three reasons why one vertical line accross screen can happen in LCD;

1.The missing signal from the controller IC to
LCD driver.
2. LCD driver IC itself defective
3. Dry contact in the tape carrier package.

Use masking or electrical tape to mark it where the line was located. press it if the line back to normal but when release your hand came back i think it was intermittent. Open the LCD panel

Use robber
Place the rubber on the top of TCP
Gently close back the top casing

Good luck...

Aug 21, 2009 | Mitsubishi LT-46144 46 in. LCD HDTV

2 Answers

Vertical lines on my 40 inch lcd mitsubishi hdtv 1080.

I assume your Misubishi is not close to anything electrical. However, it sounds like you have had an interference for some time. This will ineviteably cause the HDTV LCD to collapse. LCD's don't respond well close to heat. Is there a vent close? LCD's do well in a properly vented area but with all this said.......they will pick up interference from anything electrical. A few questions to ask ones self........are there any wireless devices or chargers close to the LCD? Might there be an oven, a/c unit or other wiring with 220 volts anywhere close to the LCD such as in the wall?
The Mitsubishi LT is a very reliable, multi component ready set that allows great viewing with surround sound. However, stop and think about this interference. It is not something in the unit. It is an interference. Look hard and when you've discovered won't believe how crystal clear this set will be.
Let me know what you find...Thanks for using Fixya and add any comments that may help us help you.

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3 Answers

Vertical lines on my 40 inch lcd mitsubishi hdtv 1080

Similar problem with an eleven and a half month old LT-40148. Approx. 1 inch vertical banding line on left side of screen on all inputs. After about two weeks, same problem on the right side of the screen.

Fortunately this occurred two weeks prior to the one year warranty expiring.

Called Mits customer service and they referred me to an authorized service center who I happened to have dealt with before.

They picked up the set. The front panel (LCD screen ) had to be replaced. Set was gone for two weeks as parts were not in stock. There was no charge. I hope this screen last more than a year.

Jan 16, 2009 | Mitsubishi LT-40133 40 in. LCD HDTV

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