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Samsung LN40A750 Picture Problems

by intrigued22 / April 26, 2010 5:43 AM PDT

Our Samsung LN40A750 has a picture problem that used to go away once the TV warmed up but now appears to be permanent. The picture displays a double image and is dark on the left side of the screen. The TV is only two years old, but is out-of-warranty (of course). We're wondering if this is something that can be easily fixed or if we should (gulp) go buy a new TV. Any advice is appreciated.

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Samsung LN40A750 Picture Problems
by Samsung_HD_Tech Samsung staff / April 30, 2010 7:06 AM PDT

intrigued22,

I'm sorry to hear that you're having this issue.

Unfortunately, I'm not able to really advise, considering I can't inspect the unit or determine the problem. The fix may be easy, but I can't speak on the costs. A qualified technician would be able to give you a better idea.

--HDTech

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Samsung LN40A7501
by kjsoukup / May 10, 2010 10:39 AM PDT

Hi, I'm having the very same problem. Now the screen stays dark and my TV is only about 1 1/2 years old and out of warranty. I've read a lot of complaints about Samsung. This is rediculous, I paid good money for this TV. Have you gotten any results or help with your TV?

Thanks
Kris

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Samsung LN40A7501
by intrigued22 / May 11, 2010 1:45 AM PDT
In reply to: Samsung LN40A7501

Well, we took ours in to the repair shop and found out that the problem was a crack in the LCD ribbon cable and that it would cost us $700 to repair. We decided to buy a new TV instead, with and extended warranty, this time!

I have to say, I'm VERY disappointed! I can't believe I paid almost $2000 for a lemon. Sigh...

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Samsung LN40A750
by kjsoukup / May 18, 2010 1:09 AM PDT
In reply to: Samsung LN40A7501

I sent my TV in for repair, just got a call $686.64 to repair. They said it was the LCD Display panel - TFT panel. I am so upset about this, I can't afford to get it repaired. I paid $1,364.00 for this TV 1 year and 5 months ago. I called Samsung today to see if they would at least pay for parts, NOTHING. All they could do was repeat that it was out of warranty. I asked to speak with someone else and they would not forward me to anybody else.

I filed a complaint with the BBB and I'm not finished yet!

Kris

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TAB bonding problem
by standupforyourrights / February 24, 2011 4:09 AM PST

I too have had this problem with the very same model, it is most often improperly diagnosed as a t-con board issue by most who just want to provide an answer for the sake of there own ego at various forums. This is a manufacturing defect. I have been dealing with Samsung for over a month now and have been offered a replacement model of lesser quality(LN40C650L1F) at a prorated cost of $300.00 to me which I have not accepted as of yet. My TV began having this issue almost exactly 1 year beyond warranty period. Typically it will only happen when TV is cold(if temp in room falls to approx. 68 deg or lower). When cold due to naturally occurring shrinkage as with anything, the tab bonding contacts to the screen are broken and therefore gives you 3 thin horizontal lines across separating the screen into four quadrants vertically and blurry details of everything including channel info, menu info, etc. It goes away after several minutes of warm up time, as the unit warms up expansion of the panel resumes and contact through the defective tab bond is made and picture is back to normal. A quick test to determine this is if you gently squeeze the bezel(frame) around the panel at the top left corner approx. 2 to 4 inches from the corner(this is where the defective tab is located for this particular problem) the problem will go away until the unit is turned off and has ample time to cool off again. When you squeeze you are effectively forcing the tab bonding back together and contact again is made. Another way to diagnose would be to turn your thermostat in house up above 72 degrees or so and wait a few hours for the TV to acclimate to the temp(expand) .This is why if left alone for a few minutes to warm up the problem disappears. Consequently people who keep there homes on the warm side, say above 70 deg. don't often see this problem, but the more heat-cool cycles the units go through the more likely this problem will rear up its ugly head.I believe this defect will pop up eventually on all samsungs produced with the same tab bonding method or materials that were used for however long they were manufactured that way. Naturally everything moves(expands and contracts) through heat-cool cycles but proper engineering methods or materials should prevent something like this from happening for at least, lets say 10 years, the average life expectancy one would expect to get out of a $1500.00 or more purchase depending on screen size. Common sense would dictate larger screens would be more prone to this problem due to more movement and smaller less prone. Unfortunately there are numerous tab bonds all across the top of the screen(panel) and different ones affect different functions of the operation of the set, therefore there may be many other various problems people may be experiencing with there samsungs due to a failure of one of these tab bonds. They are often erroneously diagnosed as circuit board failures due to laziness on the part of the tech. I would recommend to anyone experiencing intermittent or any problems to gently squeeze all along the top of the bezel to locate a defective tab bond. As for dealing with Samsung, all I can say is good luck, it is difficult to reach their corporate office and even more difficult to get a resolution. I would gladly join in any class action lawsuit if brought about as the one regarding their capacitor issue disappeared once they sought to start addressing the issue and this was only after an absurd amount of complaints to the NJ BBB and consumer affairs websites. I think they realize that they have a huge problem with most models manufactured in the last 3-4 years(primarily due to using cheaper components as a cost reduction/profit boosting solution) and as with any large corp., are not willing to issue any recall as it is cheaper to just deal with angry customers on a case by case basis, very unfortunate for them as their sales will suffer terribly because most people research on the web before making major purchases in today,s world and thank god for that.

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what is the fix?
by Mustang1964 / June 16, 2011 6:37 AM PDT
In reply to: TAB bonding problem

ok so you tell us what the problem is not, but you dont tell us what the problem is exacatly and how to fix it.

how do you fix it?

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Tab bonding help LN40A750
by student12.class / January 5, 2014 12:51 AM PST
In reply to: TAB bonding problem

This review was very helpful. I too have the same issue, and Samsung did not help me at all.
I bought two televisions at the same time, and both have had issues. The other one had a capacitor failure.
But this LBN40A750 cost $ 1,500. and it failed within 3 years. It has the same dark cloud everyone else is reporting. There were videos people posted on YouTube, but they've been taken down. I wonder why they are no longer there?

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My guess
by R. Proffitt Forum moderator / January 5, 2014 2:36 AM PST

I've offered such in the past and folk demand that I support them in fixing their PC or TV. So I take such down because folk have become a little too demanding. I'm sure you heard the story of helpful folk pulling over to help change a tire then the owner with the flat opens the trunk then goes and sits in the car waiting for the help to do all the work.

-> About the capacitor issue. If you don't erupt in flames I've seen Samsung do one time warranty extensions. The tab bond issue however extends to all makes that used tab bonding.
Bob

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