Samsung Ln52A650A1Fxza bad picture botton of screen

[dcaron614]

Hello, I have a Samsung Ln52A650A1F and I'm not sure what could be the issue with this, The picture is only bad at bottom of screen but stretches across the whole screen but seems really bad on lower right side seems blurry red. I have tried resetting all cables from the Tcon still no luck. Any ideas or is this just a non fix TV/panel ?

[budm]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

Does it change if you try flexing the LCD panel?

[dcaron614]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

No, but the screen seems to clear up slightly for a moment when 1st turned after being off for a long period of time

[selldoor]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

Could be water liquid damage even someone cleaning with cleaning fluid - it runs down and
corrodes/shorts the wiring at the bottom of the panel.

[Hobby 1]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

Tab bond issue. Just fixed the 46 inch version of this model a couple of weeks ago.

[budm]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

The SAMSUNG/SONY in those time periods are know for having tab bonding issue.
This is what involved in dealing with tab bond problem.
https://www.badcaps.net/forum/showth...ht=tab+bonding

https://www.badcaps.net/forum/showth...ht=tab+bonding

https://www.badcaps.net/forum/showth...ht=tab+bonding

[dcaron614]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

Hmmm, thanks a lot guys. I will work on the panel tomorrow, where can I buy the Silicone thermal interface pad from. I'm here in Ohio

[AFajitas]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

I would tear it down and confirm tab bonding first. You can even use electrical tape to fix it temporarily.

[dcaron614]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

No luck on the top tabs, rubbed my finger across them and I didn't notice any change, but when I rubbed my finger across the lower tab or whatever that's called on the bottom right side where the problem is i did see it flicker/change but not enough to correct the problem. so is it safe to safe the TV panel is beyond repair or did I not check the top tabs correctly?

this is the lil tab on the bottom right side

[AFajitas]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

That looks just like a tab bonding issue I had on a Sony. It took me some time and a few tries to actually find the problem tab, so don't give up. Sometimes you have to apply pressure to the tab while turning the TV off and back on to fix it, but you should notice some flickering or change when you find the problem tab.

[dcaron614]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

Ok Thank you Afajitas, I really do appreciate all you guys help ....I will keep at it. Beer break time right now thou...lol

[Hobby 1]

Re: Samsung Ln52A650A1Fxza bad picture botton of screen

I agree with AFajitas. Sometimes you have to turn power off and then on to see if the problem is corrected. Don't rub the tab. Apply pressure carefully. Find the magic spot. I have fixed sets with 4 horizontal bands on the screen doing it this way. If the timing signals get messed up, you have to cycle power to the set. I have had better success with hard vinyl bumpers, about 1/8 inch thick and then use the screws on the screen frame to apply pressure for that tab. Stick them to the frame, not the tab or the screen.

I usually leave the set on the base and tilt it backwards by placing a 2 x 4 piece of wood under the front of the base so the screen does not slide onto the floor. This makes it easier than laying the set flat on its back. Fastest time to find the magic spot was under 10 seconds. The longest was several days. And some just don't want to be fixed.