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Tv turns of in 3 seconds

Hi, I have an electronics background and test equipment ( scope, dvm, etc.)My tv turned of several weeks ago on its own. I got the schematics for it and checked the standby voltages. The 12vdc was not working. I found a leaky cap. c973 and replaced it. The tv worked ok for about a week. And then I noticed that the only the video input were working. I used it with a vcr to tune in the stations. This worked for about a couple of days. The problem came back again and I found L972 had an open. I replaced it. The problem still exists the tv turns off in 3 seconds. The standby voltages 12vdc and 130vdc and there. I checked R588 as recommended by another helper it was ok. He also suggested cp205. I could not find it. What should I check for to fix my problem? Thanks, Kumar

Posted by Kumar Ganesan on

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Check that none of the other capacitors are faulty. They may have 'Capacitor Plague' if they are from the same factory.

Posted on Oct 01, 2007


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There are probably a few capacitors on the power board that have defective formula and will need replacing. If you have some basic test equipment and a basic electronics background I can walk you through some troubleshooting steps. Otherwise if its still under warranty take it back, if not you can consult your local TV repair technician. CLICK HERE to find TV technicians in your area just enter your zip code.
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It would be the psu, you may be lucky and its just a few blown capacitors that need replacing, if you have not used it in a awhile and its been in standby, then you unplug it and plug back in, it can sometimes blow, as its not been used so components maybe weak, then turning it on has caused the voltage though and the weakness in the capacitors to blow.


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If multiple electronic devices are failing in your home all at once, I would probably first have to ask if your home recently experienced an electrical storm or major power surge of any kind.

Normally the effects of such large-scale surges are immediately noticeable - TV's and other major electronic devices may fail to turn on, fuses may be blown or circuit breakers tripped, and in some cases electrical wiring may be melted.

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