LCT3201AD TV works for about 20 minutes then shuts off. It will immediately restart when the power button is pressed. This cycle continues with the run time getting shorter and shorter until it will only run a minute or less. After an extended time off, the cycle will repeat with the run time getting shorter again.
From what I have read the power supply is evidently at fault, but I have had no luck in obtaining a replacement. Is there any help you can give either repairing or telling me where I can find a replacement. Shipping you the board for repair would not be a problem.
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Only thing I can suggest is power cycle: disconnect from AC for 1 minute then plug it back in. If it continues to do it then it sounds to me like a fault in the power circuit is triggering a protective shutoff.
had a very similar situation with my Phillips 42 in. LCD TV.
Here was my Problem. The Power Supply Board. I opened it up( Warranty
was Expired) and found several faulty capacitors on the PSB. Its
pretty common. Major Electronic companies were sold faulty capacitors
that fail in 2-5 years instead of 10-20 due to a lack of
preservatives. It wouldn't surprise me if you have the same problem.
TV will work fine for a few years and then just fail completely or
Here are the solutions
1. Have it Repaired
2. Check for faulty caps and if you find some(budged or leaking) you know you have located a problem
Remove the board and replace the whole thing.
3. If you have some soldering skills you can replace the faulty caps.
Caps are very inexpensive, under a dollar in most cases. I replaced 4 for about $5.00
Although not a great solutin it does allow me to use my fairly new and expensive LCD TV. Heres what I do, UNPLUG THE TV FOR 20 -30 MINUTES, WHEN PLUGGED BACK IN YOU NEED TO VERY QUICKLY PUSH THE POWER BUTTON ON THE TV.
Let e know if this works fo you.
If you are electronically inclined, replace the three 1000uf 16v electrolytic capacitors in the power supply board located above the power switch. They are likely bulging out at the top and failed. They are the three in a row at the top - center of the board, located between the two black heat sinks. Make sure you get caps rated for 105c degrees! I recommend replacing them with 1000uf 25v caps. 35v caps will work but might be a tight fit as they are larger diameter.
Should cost you about $8 for the parts shipped. You can get them from partsexpress or digikey or any good local electronics store. Your local radio shack may have them but they won'y be 105c and thus may not last long.
Not handy, ask around, there is usually some electronic tweaker guy around that will install them for a few bucks.
This has solved the turns on / then off problem every time in the 3 I've done.