Hi i have a big screen tv a zenith. sometimes it will go black but still have sound. i took off the back panel and put a fan back there and now i don't have the problem. can some one help with this. if i move the fan it go black.
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Re: zenith 51" tv
There is a very good chance that the fault can be in the power supply, and or one of the scan circuits are failing, due to a few parts that have come off their values. These types of faults are due to age and use.
You should call in a service rep who is familiar with your make and model of set. He would be able to give you a proper estimate for the repairs.
Some of these repairs are very reasonable in cost, while the more difficult types can be rather expensive.
Hope yours is the first case
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If the lines are thin and close together running horizontally, it may be the vertical driver, but that usually takes out the resistor and sometimes the diode in the B+ for the vert. Also you must replace the caps that caused the problem in the first place.
Just happened to see your black box problem associated with your T.V.; Thought I would pass along an idea for you to check into, and let me know if it helped...Check into whether or not it has a onscreen text block mode, if it gets into this mode by accidentally pressing the wrong buttons on the remote and or TV, it could and I have seen, at least with zeniths, a big black box which will cover the whole screen except for a 2 to 4 inch border around the box and outer edge of the screen...if this is the case, find someone familiar with the correct setting for the set associated with this problem, and get it back into the right mode....Hope this helps..T.
This just happened to my Z50 yesterday...10 days after it came back from the repair shop! The first repair was for the "popping" problem where the tv makes a loud pop and the screen goes black. This took 6 weeks to get fixed. For this new problem the repair center is getting hold of LG to find out what to do. I am also calling them because I see this is a major problem that people have been experiencing out of warranty. The first customer service rep told me I was out of luck but I am not accepting that answer. Good luck, we'll both need it.