Hey everyone here
After spending hours of my life with reading posts in this forum and watching Daves Videos i decided to try my luck with an own problem here.
On Saturday I 'luckly' got the old broken Panasonic TX-32LE7F LCD TV from my parents. I hoped i could repair it so i would get a nice TV for my small student-appartment for free..
The actual problem was that the images/frames are sluggish and go into each other, as said above. For example the classic image noise isn't visible as many black and white moving pixels it's more a grey/white 'fog'. I read somewhere that this is called 'Halo-effect' but i'm not sure if this is right.
I also uploaded a video of the Problem on my Google Drive Folder
hereMaybe a helpful information: It doesn't matter which signal input i chose and the problem was also present in the TV-Menus, so i think it has nothing to do with the Input circuits themself.
Well, after my parents brought over the TV on Saturday i checked if the problem is still there and yes it was! So i opened the back to check for failed caps or burned fuses (As in one of Daves Videos). But nope nothing. To check the voltage rails i turned the TV back on but somehow the problem was gone.
I thought i might have touched one of the connectors inside so i jiggled on all the connectors again to see if anything changes but again: nothing, everything worked fine, so i reassembled everything.. Well i wasn't sure about this "miracle".
The rest of the Weekend the TV worked fine without problems (i switched it on and off for several times) On Monday also no problems, even after a pretty long "The Matrix" DVD Marathon^^
But then, on Tuesday Morning as i turned it on.. baam: the problem came back. Actually i expected something like that because i haven't fixed anything on saturday. Of course i opened the TV again and measured everything (again), this time also the rail voltages (3.36V, 4,92V, 24,05V) but nope everything seemed to be fine. I unplugged all the connectors cleaned them with contact spray and Cotton swabs, measured the temperature of the image processors and heatsinks on the power board but nope.. This time nothing changed as i turned it back on again. The Problem was still there and now i'm out of ideas, that's why i wanted to try my luck here in the EEVBlog Forum :$
There are also some pictures in the Google Drive folder above.
Thanks in advance for any ideas!
Greetings from Germany
morxw