Tv was working fine then yesterday had no picture changed video cord tried a dvd still no picture only sound
Back-light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis.
http://electronicshelponline.blogspot.com/
SOURCE: No sound on LCD tv
We have the RCA L37WD22 tv. We bought it 4 months ago and much to our dismay, the sound went on the weekend and the screen shrunk. We had to take it in to be fixed. We were told it had shorted out and that the fuse needed to be replaced. We were also told that an upgrade was put into it. We have a one year warranty, but we are going to look into buying an additional warranty too.
Hope this helps.
SOURCE: LG LCD/DVD TV no sound on TV - DVD works fine with sound!!!!
HERE is the servce manual for this TV
SOURCE: Element 32'' LCD TV, has picture but no sound
The S-video cable doesn't have hookups for audio, only video. It's better than the video coaxial cable. But, you still need to hook up the right and left audio coaxial cables.
SOURCE: have a 42 in rca lcd tv ,hsound but no picture
IF the set is under warranty, you should return it.
Do this to see if your set is "sending" the image to the LCD panel.
1) What the set on take a bright flashlight and press it against the screen.
2) Look for the "image" moving around the edge of the flashlight.
3) If you see the "image" then the problem is in the inverter/CCLT or the power to it.
4) If you do not see the "image", you should look at the LCD controller(TCON) for the problem.
SOURCE: "Unusable Signal"
Ok. PCB means Printed Circuit Board.
It looks similar to the picture down below. A part must have gone bad on your PC board. So, the RCA shop ordered a replacement PC board to fix the problem. It's an interchangeable part. All newer TV now have PC boards, which each one hold a different function.
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