Question about Televison & Video
I don't have the service manuals or any technical data for this set. I will tell you genericaly what I believe is the cause.
The set re-processes the video signal for the display. There is some memory and address decoding and X-Y matrixing involved. In this process, something is loosing data or clocking pulses for the processing. A bad power supply can also cause this type of failure.
When there is data loss you can have black squares or cubes because there is new data coming in and the old has not finished process. The image content that should not be present is refered to as aliasing. The actual detailed process of what goes on in your type of set is fairly complex.
The first step that I would try is the signal processor board and the power supply.
You will have to send the set for service. I hope you have an extended warranty for this set.
Posted on Apr 13, 2008
The best and the only solution to fix this problem is to call a tech and get it serviced or if it is still under warranty just get it replaced.
Few troubleshooting steps you can try:
1)Do a hard reset by unpluging all the cords for 4hrs and then plug it back.
2)The whacking test is to just bang or smack the set with your hand on the back, side, top, etc., to see if there are loose connections or cold solder joints inside that are acting up. If so, the banging should knock them back to normal and the set should restore. You might have to use some creative banging and some have had to put a book or magazine under one corner to torque the chassis enough to get it to work reliably.
Please don't forget to rate the solution
Posted on Apr 13, 2008
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Posted on Jan 02, 2017
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