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I have old panasonic tv.model TC-14L3m and got no sound but picture is good...what is the problem?any component need to change?

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 556 Answers

SOURCE: Relay "Chatter" with good picture and sound

Sanyo Model AVM-1304 This TV has a loud mechanical "chatter" (or clicking)that appears to be coming from RL001 on the motherboard as soon as ther TV is turned on. I can feel the mechanical vibration on the component. The Picture and sound are very good. The chassis is G6Y-13040. Any ideas? This TV has a loud mechanical "chatter" (or clicking)that appears to be coming from RL001 on the motherboard as soon as ther TV is turned on replace relay as it is easily available or make it direct. .

Posted on Sep 11, 2007

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jhall1793
  • 60 Answers

SOURCE: PANASONIC TC-20L3T

The vertical driver is starting to fail. It's the device that supplies the height of the picture. Hence the name. I do not have a part number for this item. You would need access to a service manual. Is the model # correct? I did a quick search & haven't found anyone who recognizes that #. Not even Panasonic. If the model is correct than Panasonic no longer supports your TV. There maybe a repair shop with a copy of the service manual somewhere in the US. Gaining access to manual for the parts list then finding a suitable replacement part could be quite challenging. The fact the unit is 15 yrs old means that you've more more than received your money's worth. With the advent of digital broadcasting starting next year, its probably time to seriously consider upgrading.

Posted on Feb 21, 2008

  • 9 Answers

SOURCE: Hissing sound from a Panasonic old TV...Sound and picture are OK.

If you disconnect or power off the converter box does the hiss go away?
If you connect a VCR or DVD player does it still have the hiss? We
need to isolate what source is causing the hiss if it is from the set or
if it is from the converter box.
When you turn the volume control down on the set, does the hiss
reduce in level? If mute stops it, it should reduce in level as you
turn the volume down. Then turn up the sound level control on
the converter box whether its a manual control or by remote. If you
can get a combination that minimizes the hiss and gets higher sound
level from the programming that may cure it.
I am not familiar with the converter box you are using. Are you using
Audio/Video cables from it to the set or is it coming out with coaxial cable
and used on a channel? If you are using a very old set with a tuner input
perhaps the fine tuning is out of adjustment.

Posted on Feb 21, 2009

techman
  • 3130 Answers

SOURCE: TOSHIBA PIP 29 INCHES OLD MODEL TV MODEL NO 2938

sounds like the vertical output IC and the filter capacitor in the vertical power supply.

Posted on Jul 07, 2009

  • 178 Answers

SOURCE: Pictures shrinks.. Panasonic TC-20LM Television

Shrinking picture is a voltage regulation problem in the switch mode power supply, Possibly a cap used in the feedback circuit. Or an over current condition on the B+. This is a very tech intense repair because there is no magic bullet. If it is shrinking on bright scenes then you can bet it is a regulation problem, bright scenes draw more current from the power supply causing this effect. I would not suspect the horiz output because the regulation for this circuit usually comes from the main switch mode power supply. One diagnostic is to monitor the B+ going to the horizontal output and see if it fluctuates. If so you can bet it is a cap or optical coupler in the switch mode circuit.

Posted on Oct 10, 2009

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Pull up previous posts by its left sidebar, or type in the brand name and model number to of your set, to its search box, and press 'Enter' or view it in Mosaic / Timeslide option.

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I had a similar problem with my Hisense TV and I replaced the "Main Board". Got the part on ebay. Don't know if this will help.

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My experiance is to not put money into a TV that is over ten years old. TVs stress out their electronic components worse than almost any other electronic product. After 10 years, there are so many parts that are ready to fail that your are probably wasting your money trying to get any more life out of it.
Another option is to wholesale replace the main board by sending it to Module Exchange at 972-298-1212, or PTS Electronics 800-844-7871 ptscorp.com.
Be careful on buying a new one though. Often times, these new technology ones are much worse. Always Google the model number of the set you intend to buy and add the word 'repair' or 'complaint' to see if it is one of the many models that are customer service nightmares being produced by even the most reputable companies today.
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