I picked up this dead Sammy, and replaced the power board. It fires up, but the screen is acting up. It'll get flickers, slow images, and passing dark sections. The menus and subtitles show up just fine. Not sure where to look. Ideas?
LN-T4069f video issue
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Re: LN-T4069f video issue
rolling dark sections sounds like a panel/tab bond issue, try flexing the panel a little see if anything on display changes. -
Re: LN-T4069f video issue
Well, I've killed it. I pulled it apart and found the upper left tab to be the problem. I cut pieces of 3mm thermal pad and placed them accordingly, but in the process I managed to partially dislocate one of the tabs on the left side down by the bottom. Now I've got a permanent horizontal stripe that I can't get rid of. On the next set, while I part this one out, I guess.Comment
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Re: LN-T4069f video issue
Can't seem to leave this one alone. It's got a horizontal stripe, rather a series of lighter/darker stripes, about 5 inches wide that start on the left of the panel (the side where the tab pulled away), and fade as they travel to the right. I pulled it apart again today, looking for a way to reaffirm that tab back down the rest of the way, but sure fell short. Any ideas at all?Comment
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Re: LN-T4069f video issue
I think you shouldn't have pulled it apart as you were correct: a panel problem would have affected the OSD as well.Comment
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Re: LN-T4069f video issue
A picture of the fault would help a lot.Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LN-T4069f video issue
To me... that looks like a defective LCD panel... sorry!Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.Comment
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Re: LN-T4069f video issue
I place silicone pads on the upper tabs several days ago and the original problems basically went away. There was still a "little" odd behavior when cold, but once it warmed up (3 or 4 minutes) it was crystal-clear, for as long as the set was on. It only developed the stripe after I pulled it back apart to thicken the pad on that upper left corner, and ended up damaging the one on the vertical side. At this point I'm debating pulling the other side tabs loose and removing the plastic shims around that left tab to see what it does. I get the feeling the pic is going to fade lighter on the left side, but again, what is there to lose at this point...Comment
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Re: LN-T4069f video issue
Well, given the shape of things I figured there wasn't much to lose, so I tore into it one more time. It was the tab on the left vertical side at the bottom that'd come loose, and the makeshift shim and pressure pad did change it, but not much, and it took a fair amount of pressure to even get that much. Without that pad and shim the picture was still there, just a bit lighter than the upper 3/4 or so of the screen. There were no wires attached to the tabs so I thought MAYBE they redirected signal through the lcd, and seeing as one of them being displaced lightened the picture and didn't kill it, so why not disable the other 3 on that side, so I did. Got it back together and things look fine. I had to make a few adjustments on the settings, and I've got a very thin blue line on the out left edge, but I'm happy with it. I MAY try to reset the silicone pad on that upper left tab, or I may not..Comment
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by alltvrepairsHi,
I have confirmed that I have a mainboard problem.
I have tracked no hardware issued on board so might be a software dump required.
I have searched a bit but wasn't able to find anything for my screen:
Here are some more details:
Panel: cy-nn065hgev1h
Main: BN94-14180M P08F
Your help much appreciated!
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