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Make sure TV is not muted.
Check all wires to ensure they are firmly connected, including any
Ensure that the audio and video cables are connected to the same inputs on the TV. For example, if the video cables are connected to the Video 1 set of inputs -
This depends on what TV video and audio inputs you have and what Computer video and audio outputs you have. For sound you can use the headphone output from the computer and the Red/White RCA jacks on the TV. For video its more complicated because you need to know what physical cord will plug into the TV input and to your Video Card output first, then see if you can adjust the video cards output signal to a signal that your TV can display.
If you can snap a couple pics of the TV and Computer sound and video connections I will try to give you some advice.
can you see any any menus or the volume bar or channel indicator?
Make sure all your audio and video cables are hooked up correctly to inputs on the TV and to the same set of hookups. For example all of the VCR cables hooked into video 1 and all of the DVD cables in video 2.
Also check that you haven't hooked up the video to the tv's output. Some sets output audio and/or video for external devices such as recording setups or home theater sound systems.
If you use a component system (1 yellow video wire, 1 red audio wire and 1 white audio wire)
You will have to connect the audio wires to your cinema system and the video directly to your set.
The unfortunate part of this is that when you want to use your system, you will have to change the input of the TV AND the Cinema system.
The same would be true if you wanted to use the DVD connectors (YBPBR). You would connect the video to the TV and the audio to the Panasonic unit.
The system you have is meant more for just playing DVD's and not a total cinema system. This is why there are limited (extremely limited) video inputs. The system is mostly for output of sound and of a the built in DVD video.
The red, blue and green RCA hook up is just video. You must also use the red and white pair of RCA jacks for the audio. You can usually find the audio red and white jacks right below the video red, blue and green RCA jacks. Get yourself an audio RCA cord with the red and white connectors and run that from your video device audio output to the audio input of the TV that corresponds with the video input of the TV. An example would be if the red, blue and green are on the "Video 1" input of your TV you will find the red and white audio input for "Video 1" right below or right next to the video inputs.
The red, blue and green video jacks are called "component video" and they only have a video signal for high definition video, so you must also run a separate audio line for it. The same holds true for the yellow video RCA connector, that one is called "composite video" and it also has only a video signal with no audio.
I hope this helps, if so a "FixYa!" rating would be very much appreciated.
If you need more help just post your concerns right here onthis thread.
Your cable box and TV should have RCA input jacks (Red, White, and Yellow) Red & White are for Audio and Yellow is for video feed...
HD Receivers & HD TV's are just slightly more upgraded with better video feed connections. HD video can use three color coded RCA jacks for the video feed or a HDMI cable; if you can use the HDMI connection on your TV I recommend using that because it's less confusing to plugin the input cables. Try turning your TV to it's side to see what inputs you have available to connect your device to.
After you have it pugged your device into the input jacks press the "Input" key on your TV remote and power up the device. Most TV's have more than one input, so you may have to cycle through the TV inputs by press the input key again until the video feed is displayed. (If you don't have a "input" button on the TV or remote control you can try entering channel "00")