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Hello! i have a problem with my tv panasonic tc-21v50.. It has a power and sound but no display appear on the screen. It will only totally display the output on the screen after an hour.. what should be the problem? Hope someone help me.. Thanks.

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5 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 579 Answers

SOURCE: PANASONIC TC-20L3T

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.
Hope ya fix it!

Posted on Feb 21, 2008

  • 2 Answers

SOURCE: MITSUBISHI CRT TV MODEL CT-33AC2SL

check for dry joints in power supply

Posted on May 09, 2008

SOURCE: orion TV model TV_798 sl (thin line no picture)

problem is with the vertical output circuit. take it to a repair shop and have them fix it.

Posted on Aug 29, 2008

  • 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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