Samsung PN60F5350BF problems
This plasma set is from 2014, but in the summer of 2016 I was asked to take a look at it as it had developed a few lines of distorted pixels along the far right of the screen (see pictures). I can't remember if the lines were still there when there was no input at all. Would their presence without an input source mean a bad panel?
Anyway, everything looked very clean all around, including capacitors (which I knew Samsung had issues with). Some basic troubleshooting led me to the buffer board on the far left (see picture) which is labeled 'E' and contains 4 ribbon cables that attached to the panel. I disconnected the far left two and got two bars of black, as expected. I reconnected them hoping it was a simple re-seating issue, but the lines were back. I disconnected them again and gently cleaned the cables and connectors with isopropyl alcohol and waited about 10 minutes to be sure everything was dry. I reconnected the two cables and got two solid black bars. Nothing I could do brought back an image in that part of the screen. I had cleaned all of the buffer cables this way running along the bottom of the set and they were working just fine, but these two were not. So, I shrugged and set this project aside for a later date.
Fast forward to August, 2017 as I moved the set to my house to try to pick up troubleshooting where I left off. Unfortunately, I found myself a few steps back from before because I am not getting any image at all, now. Again, everything seems clean and I've disconnected and re-seated everything (no cleaning this time) but no effect. The standby LED would come on and it reacted to remote control commands, but that was about it. I did notice that the green LED on the main board was no longer flashing, though. So, I've ordered a new main board and T-CON board which included all of the ribbon cables for $100 which should be here on Monday. I have no idea if this will solve my problem(s), but it might get me back to the "black bars" issue where I suppose only a replacement of the 'E' buffer board would have any chance of reviving this set. I feel reasonably sure this isn't a power or XSUS issue, though I guess I can't rule out the YSUS under the circumstances (wouldn't I lose the entire picture of that board was bad?).
Anyway, I can do some basic diagnostics with my multi-meter, if necessary (and safe). That non-flashing green LED is telling me that there isn't much I can do until that board is replaced, but if anyone has any ideas or suggestions, they'd be most welcome.
Note: I just noticed an older post that can be deleted from October 27, 2016 where I noted the screen was totally blank. It can be deleted now, but I'll paste the text below anyway.
Well, this has been a fun one to work on.
My sister's set, a 60-inch Samsung from 2014 (February), started showing vertical lines on the right of the screen that extended top to bottom. (see pic)
So, I opened it up to see if some cables needed cleaning and/or re-seating on the buffer boards or if it was a bigger problem. Then I somehow made it a bigger problem.
If you look at the second picture, you'll see the innards of the set. On the far left and running across the bottom is a series of buffer boards that are responsible for the vertical image. I tried gentle cleaning and then re-seated the two cables farthest on the left, but saw no change. In fact, disconnecting these did not seem to affect the vertical lines in the least! It just made that part of the screen blank (vertical bars, top to bottom) while leaving the lines intact. Convinced it had to be something else and possibly not the buffer boards at all, I reconnected everything and started it back up. This time, no picture at all for the full screen! Ouch! What did I do?!
Anyway, and advice would be welcome. I imagine I need to replace a board or two, but I don't want to replace anything simply as a diagnostic test. I want to know just what makes those lines do what they're doing and replace just that board, if possible. I am hoping this will "fix" the whole blank screen issue as well, but I can treat that separately if I must, later. Let me know if you need additional pictures in order to offer good advice for me. Thanks.
Last edited by knisabre; 08-29-2017 at 05:07 PM.