Question about Zenith Televison & Video

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Zenith Z50PT320 suddenly loses picture, keeps sound. Yes, I unplugged and replugged it. It is set up correctly and has worked fine the last year. Today, the video just stopped. Thank you!

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  • Zenith Master
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Check its back-light inverter section, and back-light CCFL lamps.

Posted on Aug 01, 2013

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Posted on Jan 02, 2017

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SOURCE: Sharp Aquos LC 37D6U

Please be aware that this a big problem on this unit. The insulator material used by sharp to between the IC's on the AV board both on top of the boards and underneath the the AV pcb is failing. This insulator is mounted to the IC and under the metal heat sinc. Remove the back and pull the AV Board out of the unit. Use zylene or alcohol and clean all of the grey insulator from between the pins on the ic and order the replacement insulators from Sharp. Most times this will correct the no sound problem. Sometimes this has also damaged the AV pcb and it will have to be replaced. The parts that should be replaced come in a kit with sharp part # PSPKIT663WHZZ. If the kit is not available the 2 parts needed are PSPAZA663WJKZ AND PRDARA216WJFW.

Posted on Feb 05, 2008

  • 135 Answers

SOURCE: no picture, good sound

It's most likely the video board. The menu is injected at the output of the video stream right before the LCD panel. Having audio indicates the signals are getting from the inputs through the input switcher and audio boards. Unless you have electronics experience, I suggest having an experienced tech look at it.

Posted on Nov 11, 2008

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1 Answer

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Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts. http://electronicshelponline.blogspot.com/ In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary

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I sorry to say I think you have a component failing that is related to heat. 15 years is a long time and if the TV was used in hpot conditions over the years it may well be the proble, or it's just old.

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(Also, if it's fifteen years old, i think it's time to get a new T.V. hint. hint.)

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