Chances are its not a board issue but bad LED lamps in the panel, you can measure the voltage at the LED output from the power supply and see what you have there to get a better idea whats going on
SOURCE: LCD TV Has Sound, Backlights Work, but No Picture
I have been having the same problem with my LG. people say there are bad capacitors on the power supply board. I don't have the know how to replace them and don't have the money to pay. I can get mine to work by blowing hot air with a hair dryer into the back of my tv through the vents over the board. Heat it up for a couple minutes and turn it off and then back on and the picture comes back. I just never turn the set off now.
SOURCE: Vizio m550nv backlight won't work
This TV comes with a remote that connects to the TV via Bluetooth. It
remembers which equipment is connected to the various inputs, and
automatically changes the controls to match the input equipment - really
nice! I found that it will control all my equipment, and since it
works via bluetooth, you don't have to have direct line-of-sight to the
TV. Wish that the bluetooth part worked for my satellite equipement too!
Programmable remotes will operate this TV, but depending on how old
they are, they may not be able to hit all the features of the tv - our
older directv remotes will operate the basic features, but only the
newer models will change the input source - so you may want to use the
remote that came with the TV. We have smaller kids, and wanted to limit
their use of the tv remote, because it has a slide-out keyboard similar
to those on some cell phones to make posting to facebook (one of the
apps that comes on the tv) easy. Since our youngest is 5, we thought it
might be best to keep that remote out of harm's way.
More Detail :
http://tv.babybi.com/detail.php?id_detail=VIZIO-M550NV-55-inch-Full-HD-1080p-120Hz-LED-LCD-HDTV-id126a
SOURCE: How do you change a backlight inverter board on a Toshiba 46L5200U TV?
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
SOURCE: lg led tv backlight
Fault with its main 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://electronicshelponline.blogspot.com/ . In most cases, the main board might have to be replaced. If so, a software [firmware] update too might be necessary.
322 views
Usually answered in minutes!
×