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42LC55 - LG 42" LCD Fault: TV works for approx 20-30 mins before shutting off. If you try to switch it on again, the ON LED goes Green momentarily then goes RED and then goes OFF. You have to remove the power lead out of the back for 20-30 mins before the TV works again. Then the cycle starts again. I have already changed the Power Assy Board EAY34797001. The fault remains and is the same! ???

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6 Suggested Answers

techman
  • 3130 Answers

SOURCE: Hitachi 50EX20B Bigscreen TV

You can download a PDF from here: http://www.servicemanuals.net/results.aspx?type=SM&brand=0&model=50EX20B Make sure that the coolant is not leaking out onto the printed circuit boards. i have had the remote sensor cause this problem before and also I have had bad capacitors in the sweep and the main power supplies. Good Luck

Posted on Jun 14, 2007

  • 231 Answers

SOURCE: Sony KDF-E42A10 cycling on and off

the best thing to first is to replace lamp ..lamp will also cause this..this will be the cheapest route to go first..Please let me kno and I will give you more info or docs from Sony...

Posted on Dec 14, 2007

ctf1800
  • 4402 Answers

SOURCE: Power LED blinks red

it is a bad fan. it also could be a power supply. Quite often the real problem is dirt clogging up the fan(s) to the point that they need to be replaced. Operation of the set in a dirty environment is not a good idea

Posted on Feb 26, 2008

  • 1 Answer

SOURCE: Samsung LNT4665FX 46in flat screen

Check out the fixYa solution for the Samsung LNS4051D- it sounds like the same problem. Defective capacitors. You may need different part though.  We just fixed my mom's LNS4051D with that problem. I have the LNT4665 and although it hasn't failed yet, I am tempted to get some capacitors just in case.

Posted on May 18, 2009

  • 13 Answers

SOURCE: TV turns off and power light blinks unpluged andd still does it.

Likely to be the STK convergence chips causing a protection circuit to switch the TV off. Have you got any onscreen convergence problems (i.e, colour fringes)?

Posted on May 28, 2009

  • 1 Answer

SOURCE: My lg 62sx4d-ub will not

I just had the same problem. Came down to a bad cap on the main power supply board C871. This is the first filter cap after the diode on the 6V supply. Funny,, the schematic calls for a 25V part,, however this one was rated at 16V :-)

Replaced with a new one,,, all is good to go!

Jer in Hayden

Posted on Oct 26, 2010

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