Question about Sharp Aquos LC-42D62U 42 in. LCD HDTV

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Shuts off Sharps Aquos LC-42D62U keeps shutting off, then it will show blinking lights on the front of the TV. Then you can touch the power button and it will come back on for a few minuntes then repeat the shut down again. A tech. has replaced the power supply unit but it stiil shuts down. From reading the forum it may be a main circuit board. Are there other circuit boards in this model of TV that can cause this problem? Thank you for your time. Rick

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From the information you have provided failed capacitors in the power supply is likely causing the problem. The safety circuitry shuts the TV set down when it detects a problem. This model of TV has over 2,000 parts which include millions of transistors inside the integrated circuits. The capacitors will change value, leak and become defective. Resistors will change value and burn. Integrated circuits and transistors can go bad. This can cause other components to become defective, which can have a domino effect and cause other parts to fail. Replacing one defective part may make the TV operate for a short time but the part will fail again since if the parts that caused the failure to begin with are not replaced. The only way to know for sure what is causing the problem, which parts that are no longer within factory specs and for proper repair all the electronics must be diagnosed by someone with the correct electronic test equipment and the skills to use the test equipment. The repair should cost about $250 if carried into a TV repair shop. A small TV repair shop will often charge less than a large repair facility.

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Are you willing to sell the tv as it is

Posted on Mar 02, 2010

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