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My bang and olufsen avant 32" television, when I on it works for about 3 minutes and then it becomes green and white lines appear on the screen.The sound works perfectly.please let me know the cause of this problem and how much it would cost for the repairation? thank you, kind regards, Joseph.

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  • Televison & ... Master
  • 74,468 Answers

If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.

Posted on Sep 10, 2017

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6 Suggested Answers

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Posted on Jan 02, 2017

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  • 1153 Answers

SOURCE: Green and purple vertical stripes on our TV screen

The cause is one or more shorted transistors either on CRT board or on main or both. The colors are red,blue and green, you have a transistor for each and a bias trans. check each there are 6 in all.

Posted on Sep 14, 2007

Shuttle83
  • 1139 Answers

SOURCE: Green Screen

The lines are retrace lines and the green screen could be a problem with the picture tube or a problem with the video circuitry connected to the green gun of the picture tube. Troubleshooting must be done to determine the overall cause of this problem. Is it an easy fix. If I were in my shop and you bought this set in, it would be finished in a day. It being easy depends on the person, easy for me may not be easy for you, I have the equipment to fix this problem, and that is what it will take. let me explain: First I would use a schematic to show me the voltages that should be present on the picture tube socket board, for red green and blue. Then I would measure the high voltage on the anode and write it down (usually 20Kv to 30Kv) Then I would inject an known good signal into the TV (usually color bars) via the RF input on channel 3 From there I would make sure I write all of my measurements down and compare them to the schematic. At this point I would waant to make sure the picture tube could not be the culprit, I would power off the set unplug the set and then discharge the high voltage anode of the picture tube I have a tool that does this but it can be done with a big flathead screwdriver and a clip lead. Attach the cliplead to the screwdrive and then the other end of the screwdriver to ground. MAKE SURE THE SET IS POWERED OFF AND UNPLUGGED!! Manuver the flat blade of the screwdriver under the rubber cap of the anode connection on the top of the picture tube and make contact with the metallic clip (you may draw an arc so be prepared for an electrical discharge). Once you do that leave the screwdriver inplace as you remove the rubber cap and the metallic clip from the anode of the picture tube. Once this is done, remove the socket board from the back of the picture tube. At this point you will now use what is called a CRT Analyzer/Rejuvenator. Follow the setup and test instructions for the CRT Analyzer/Rejuvenator perform a tube check first and if the tube shows bad on any of the guns, perform a rejunvenation run on all threen guns, balance them and then test them again (repeat this about four times if needed), an more and you can count the picture tube as bad. If the tube is good or can be bought to a good state then reconnect the anode and socket board and reapply power. If the problem is gone then it was the tube, if not then it's the circuitry and then troubleshooting is needed, to find the problem in the video circuit. I hope this helps.

Posted on Sep 21, 2007

tvtechnician
  • 105 Answers

SOURCE: Vertical black line approx 3" in centre of screen with white line through centre.

you will need a new panel wich will cost you more than the tv itself.

Posted on Oct 14, 2007

  • 1 Answer

SOURCE: Samsung WS32Z10R 32" with diagonal green lines across it at all times

it sounds like an ECU has gone due to a trip in the tube, that may meen the tube might be slowly on its way out, or just a slight glitch. mine had the same thing and it cost me £45 to fix. now its great. i hope that helped. Jay.

Posted on Dec 07, 2007

  • 6 Answers

SOURCE: THICK BLUE LINE VERTICAL LINE ON SCREEN OF MY PLASMA PICTURE

IF THE LINE IS ABOUT 1INCH WIDE THE CHANCES ARE IT WILLBE YOUR PLASMA DISPLY THAT HAS GONE . WOULD BR CHEAPER TO BUY A NEW UNIT . HOWEVER TRY RINGING HITACHI EXPLAIN THE FAULT COMPLAIN THAT IT SHOULD OF LASTED LONGER THAN THE WARANTY AND SEE WHAT THEY WILL DO ABOUT IT

Posted on Feb 15, 2008

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