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Tv has sound, no picture besides menu options and volume control

I have an older tv and it went black the other day but i still have sound and the only graphics that show up are the menu options and the display.

sometimes it looks like it is almost going to start working but doesnt.

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You will need to have this repaired , it may only be a small component or two that are failing , but this does seem like one of the common component failures , testing and or research will need to be done

Posted on Dec 10, 2008

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Posted on Jan 02, 2017

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How to repair LG LCD TV 47LG70-UA no picture or sound


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/
http://electronicshelponline.blogspot.com/
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Try doing this:

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Ur tv have a button that said Menu on the bottom tv beside buttons only said POWER,CHANNELS + -,VOLUME + - ?Used the tv menu button go through the options functions look for Close Caption find CC 1,2,3 or TEXT 1,2,3 turn it all off,will stop captionning,if tv have no Menu option button.The captionning can be turn off by an original remote only.Try website like Remotes.com to buy the tv original remote.

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Not sure what you mean by no control?

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It could also be that the set is just dying; it's an older set, and certainly would be a possibility.

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I had a similar problem, checked all of the TV's control settings only to find out that my cable box had an independent "mute" function that automatically turned on the closed captions when activated. Once I found that and turned it off, all was fine.

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OLDER MODEL RCA HOME THEATER PICTURE AND PICTURE


Hi Unykue,

I am an electronics technician who just happened have been given the same set as you because it was giving the previous owner the same problem. Since I am confident in my trade, I took the set and diagnosed noise in the remote receivers input to the cpu.

What this means is that a capacitor( or something) wasn't working properly and was either not filtering the noise out or it was introducing noise into the data stream that controls the TV through your remote control.

My fix was to essentially cut out the entire remote control input to the TV. Since I have a directtv box to give me remote control, I don't care if the TV's remote works anyway.

The way I did this was to open up the unit and find the front I/O board were the buttons meet the switches for power,chaennel, volume, etc. On that board there is a plug with white wires and one black wire. The two wires to cut are the one next to the black wire and the one all the way at the other end of the black wire. These two wires are easy to splice back if you do not like the results of this procedure so that there is really no risk of damaging your set. If you wish to verify the proper wires to cut, they are the two wires that come from the IR receiver's side of the board YET DO NOT GO TO THE OTHER SIDE WITH THE BUTTONS! There is one wire that does indeed go to both sides.

This may not be a perfect solution but it is free. I hope that this will help someone out there.

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Possible problems: * The TV set may be unplugged. * A fuse or circuit breaker may be blown or switched off. * The remote control unit (RCU) may be disabled. Solutions: * Make sure the TV/VCR are plugged in and the wall switch is on. * Check the fuse or circuit breaker. Test the outlet with a lamp. * Replace the RCU's batteries: if this fails exchange the unit.

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