Question about LG DU-42PX12XC 42 in. Plasma HDTV
My TV Screen just turned off, but I hear the sound, I have no picture and I can't get the menu up.
It sounds like you may have a bad Control Board, especially if the problem is intermittent. There are dozens and dozens of posts from folks with this model LG. Usually the probles starts with red or blue verticle stripes on the screen, but in many cases the picture will go black, become pixilated, or turn various colors. Here's a link to a site that has a description, photos, and the exeriences of dozens of folks who've fixed the problem: http://greenrenovation.wordpress.com/du-42px12x-red-stripe-repair/#comment-394
Posted on Jan 31, 2010
MINE DID THE SAME THING ABOUT AN HOUR AGO. I UNPLUGGED THE SKY BOX FOR ABOUT 10 MINS PLUGGED IT IN AGAIN IT WAS FINE
Posted on Jan 31, 2010
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Posted on Jan 02, 2017
Does the lcd screen have a glow to it ? Or is it really dim if u get real close to screen u can see images moving ?
it it has a glow to it you panel lighting is fine but you control board is bad. If you have a dark screen and see faint images you panel back lighting is out u can check the power with a meter at the connection to inverter board on panel.
Posted on May 06, 2008
verify in customer menu, installation, software upgrade, current software info that software is 188.8.131.52. if not upgrade by downloading from p4c.philips.com website and upgrade via usb memory stick. if upgrade is successful and menu still pops up would be a small signal board issue
Posted on Aug 18, 2008
Try leaving the TV unpugged for 30 minutes so the TV can reset itself.
If that doesn't work, most likely the TV has a power supply related problem. The most common thing to go out is the circuit board that supply power to the screen. Commonly called a Backlight Inverter Board.
I can't say it's 100% the problem because I can't actually look at the tv over the internet.
If by chance the TV is still under warranty, go that route.
If not under warranty and If you have some electronic experience, you can purchase a Service Manual over the internet and diagnose the source of the problem and fix it by soldering in the new part. The Service Manual will give you circuit diagrams, test points, and part# lists. Usually, cost under $20.
I hope I shed some light on the subject for you.
Posted on Jul 01, 2009
The flashing green light is likely indicative of a self-test failure, indicating the TV has detected some sort of internal fault. With no picture or sound, one strong suspect is the power supply. Flat-panel TV's have an internal DC power supply that converts the inbound AC current, and when these fail, or are unable to supply a minimum level of power to the set, it can behave as you describe, providing only enough power for the green light to illuminate.
Posted on Jul 28, 2012
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