I am having problem with my lg tv 21 inches.problem is "no audio & video when i power on the tv.signal is there in tv,but no display.please help me

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LG 42LS5700 - LG.com

www.lg.com > Home > Support > Product Support

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Widescreen TV Black Screen - Repair LCD LED PLASMA ...

? 3:41
https://www.youtube.com/watch?v=RbZncfiOXQA
Jul 13, 2011 - Uploaded by FixItUrselfDummy
Fix your tv with black screen blinking light, popping sound noise. ... Watch QueueQueue ... TV Black Screen - Repair LCD LED PLASMA - Problems SONY LG .... I have a 60 inch samsung DPL tv how can I stop the humming or ... What do I do if my tvturns on but its just a black screen so sound no picture?.

Press the Audio Parameter button (Looks like an x) then scroll up until you see 'HDMI AMP' and hit over to the left or right so it shows 'HDMI THRU' the HDMI will redo the handshake and you should have sound.

Dis you take the TV to a Sony Service Repair Center,Who does Sony Warranty Work?
Most Problems related to Audio is in the SSB Board,Sometimes caused by poor Solder Connections on the Board, you might just need to replace the ssb board and that should solve the problem you are having. What is the Model Number that is Printed on Back of TV?

You wil need to connect using a DVI to HDMI cable. You can get one for about 5$
http://www.amazon.com/DVI-HDMI-Cable-6ft-Male-Male/dp/B0002CZHN6
Just connect it and choose the HDMI input its plugged into(1/2/3). If there is nothing on the screen adjust the display resolution on your computer. If you are using 1080i then the resolution should 1920x1080

If those are rca jacks on tv being used to go to amp ?
Are you sure they are not input TO tv rather than outputs ?
YOu must use the AV out connectors on TV to go to amp.
25 inces is fine.

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I can see good video, but I hear no audio with my XWH200 adapters?
Published 11/21/2011 06:46 AM
Updated 11/21/2011 02:26 PM
While most HDMI sources work with good audio and video, we have a compatibility issue with audio from a few specific products (eg, DirecTV HD DVR satellite set-top box, DISH Networks satellite set-top-box, and TiVo Premiere XL cable set-top-box). If you are experiencing problems with no audio or muted audio with one of your HDMI sources, then please try changing the audio settings on your problematic HDMI source to PCM or LPCM. Then turn off the TV, remote power from the WirelessHD adapters, and power off the HDMI source. Now power everything back on. If you are still experiencing no audio then please write down the model number of your HDMI source with no audio and contact VIZIO customer support.

Hi

Thanks for using FixYa. Invalid format indicates issues with the PC Mode, if the signal is not out of range then check the input source. Please accept the solution if the issue is resolved or post a comment for further assistance.

Thanks

Rylee

The coax should go from the wall to the cable box to the TV, just like you have it. Then you should run audio only (L and R RCA) from the cable box (if it has it) to the amp. Don't worry about running a video signal to the amp.

YES, DOES YOU PACIFIC VIDEO HAVE COMPONENT , COMPOSITE OR HDMI OUTPUTS ON THE BACK ? THE HDMI HAS BOTH AUDIO AND VIDEO SIGNALS AND IS THE BEST QUALITY PICTURE. BUY THE CABL AT RADIO SHACK, WALMART ETC.
COMPOSITE IS THE YELLOW RCA CONNECTOR FOR VIDEO AND RED AND WHITE RCA CONNECTORS FOR LEFT AND RIGHT AUDIO.COMPONENT IS THE RED, BLUE AND GREEN RCA CONECTORS AND RED AND WHITE FOR AUDIO L & R.