Was watching the TV normally and all of a sudden the TV turned itself off. I immediately got up and turned it back on. The TV power light and controls on the front of the TV turned on as usual, but the screen is completely black and no sound comes from the TV. I tried unplugging all connected boxes (cable box, game console, apple tv, sound bar, etc...) from the tv, but it still shows no picture or sound. I also tried leaving the TV unplugged overnight (read that somewhere), but still no dice. Does anyone have any suggestions or ideas on what might be the problem or what part of the TV may have gone out? I am looking for ideas so when I contact the repair guy I will have some sort of idea on what could be the problem. Thanks in advance!
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. Surf the site with patience. Pull up older posts.
http://electro-medical.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: No Picture on LG 50PC3D
No power?
Unplug power cord- safety first!
open backcover
check powersupply- top center right is p.s.
top left side of powersupply you'll see 5 capacitor 3300uF 10V.
see any pop up on top? replace it All with same rate or 16v is O.K.
do not use temperature rate 75c. Use 105C.
if you know how to solder. you could save $300 at least!
SOURCE: 42 inch LG Plasma TV - Lost picture
Most likely what happened is one of the capacitors went bad. When a capacitors goes bad it produces a popping sound. This could be an easy and cheap fix if you find the bad capacitor or capacitors. The bad capacitor will have a bulging top most likely on the power board but could be anywhere.
SOURCE: 52LG70 sometimes turns off and on periodically
I had the same problem. I changed the 4-3 setting on the motorola cable box. Turn off your cable box and press menu. My 4-3 setting was set to auto. If you turn it off, you lose the 4-3 aspect on most channels. I changed mine to 480p and so far it seems to be working. Worth a shot.
SOURCE: 55 inch led tv will not recognize my hdmi cable?
on you r remote there should be three hdmi settings just try each one it will likely work with one of them
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