Question about LG 50PX1D 50 in. Plasma Television
My friend experienced the "POP - and screen went blank" problem a
couple of months ago. He got an estimate on the repairs but decided to
get a new TV instead. I have worked on electronics in the past and
know a couple of people who have worked on similar TV's so figured I'd
take a shot and try to fix it.
Yesterday we replaced the YSUS and ZSUS boards with (supposedly) new, working boards purchased from a local Zenith parts distributor. I turned the unit on and had a full screen of black and white static, then a few seconds later the left 2/3 of the screen displayed a pink/orange static.The right side of the screen was mostly dark, with a little dim static.
I unpluged the tv, waited 30 seconds or so and tried again, same result. I hooked up a known working antenna, same result. So I started fiddling with the remote. I think I was able to navigate the memnu with the remote arrow keys, because each time I hit up or down the colored static would chage a little bit (color or width). Blindly changing channels also changed the colored static but it mostly stayed on the left 2/3 of the screen. Also we did have audio, so I belive the tuner works.
I also changed the inputs with the remote (just to see what would happen, the only input attached to anything was the TV antenna) on some of the inputs we saw a 3"-4" vertical orange bar that every few seconds would change position, it kind of looked that a creen moving a display around to prevent burn out. Note that this orange would appear on the right 1/3 of the screen that had only dim static when I was navigating the menu or changing channels.
When we were instaling the new boards, we found one connector that had a pin bent down (possibly happened when being put back together at the shop when the unit was taken in for the repair estimate?) so we looked anround but did not find any other bad connections.
Anyway, sorry to ramble on but I am unsure of where to go from here. If anyone has any ideas that would be great. Otherwise I'll probably scrap the unit and try to Ebay the parts.
Thanks in advance for any advice!
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Posted on Jan 02, 2017
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