When I press the power on button the red LED starts flashing green, then goes solid but my video signal won't appear. I can tell the screen is powering on because it goes from totally dead to a flat black but no video. Typically the small box showing what input you are on shows up in the top right corner but nothing. If I unplug the power and plug it back in it will eventually work. Sometimes I have to unplug the TV 20 times, sometimes it takes 3 times.
Fault at its main digital board. Short circuited component/s at it. Contact any service technician; or the authorized service center. If you wish to get some details; check the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
Before going further; try a hard reset first. If it does not help you, replace the main digital board. There are two methods to reset TVs. The first is simple to do; a Hard Reset. The other is somewhat skilled; is a Factory Reset (System Reset). To make it a hard reset, just unplug the TV from AC mains wall socket, and re-plug it back after 15 minutes or so. If you do this by overnight is better. This procedure will make it a hard reset. If you want to make it a system reset [Factory Reset]; you have to enter its service mode option, and select the factory reset option. If you wish to get some details; visit the site linked here.
SOURCE: tv guide on our LG tv
It is NOT the main board. You need a V CHIP UPGRADE "epk file" Email me and I can walk you through it, very easy [email protected] Put "TV GUIDE" in the subject line
The problem started with TV GUIDE messing with things while they are doing their digital conversion
SOURCE: how to reset lg lcd tv
Whe you press the power button the TV led have to blink several times and the it have to change to blue, meaning Tv is on.
If you press the power button and the led start blinking and goes off, then you need to replace the mainboard because it is damaged.
Bye
SOURCE: 42" LG 42LC2D HDTV Will not turn on
Hi, sounds like a power supply problem, most likely needs capacitors replaced, costs about £5 to do it yourself, and a fortune in the repair shop, easy enough if your handy or know someone who is,its worth a try,it'll be going in the bin anyway, cam
SOURCE: No Sound, No Picture on LG 42LC7D
I do not have a solution but I have the same situation with my tv
SOURCE: My LG Plasma 42PC3D turns on and off repeatedly. I
Your plasma TV has a power supply 6709900019A. These power supplies failed due to defective capacitors. See the picture below and check the capacitors mark with the red lines. There are 10 capacitors that should be replaced even if they do not show signs of bulging/swelling on top.
The value of the capacitors is 3300uF/10V but you can use 25 volts as long as they fit in the space provided by design.
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