Connecting Panasonic SC-PT550 to TX-L42E5B

SOURCE: cant get my viera linked panasonic to play through surround sound

I had the same problem, so i contacted panasonic, I am including the email they sent me.


For connections of audio, so that you can hear all tv audio through the
surround system, connect either an optical audio cable or red & white
analog audio cables from the tv to the home theater. If you are using
optical audio, there is a plug on back of tv labeled for digital audio
output and an input on the surround sound system. If you plan on using
analog red and white, use the PROG OUT red and white output jacks on the
back of the tv to the AUX input on the home theater.

For video connections, to get HD you will need to be using either HDMI or
Component cables. HDMI is the cable that will provided 1080p signal (the
best HD signal), but if the source does not output 1080p, then your tv
will not display 1080p. Most cable boxes output at 1080i or 720p when on
HD stations. This signal still provides great picture quality, but HDMI is
not needed to get these HD signals. You can use component cables for your
cable box and the DVD player output to the tv for video. HDMI might give
you a slightly better picture quality but the signal will be the same.

To make the connection, you will want to connect from the cable box to the
tv (component or hdmi). Also from the home theater system to the tv using
hdmi or the video cables from component (red, blue, & green cables).

We hope this information is helpful to you.

Thank You,
Panasonic Consumer

SOURCE: I have an LG TV

Hello,
There are two things that I can suggest.
1-Test your optical cables to make sure they a good on a known working source because they are very fragile and break very easily.
2-Try to eliminate the use of optical output from tv to receiver. There may be a problem from the HDMI to optical conversion at the tv. Instead, try running the audio directly from the source to the receiver, and let the tv deal with video input only.
Hope this helps,
Good Luck.

SOURCE: I have a Panasonic Model TC-p42X1 TV hooked up to

It's possible that you have the wrong type of HDMI cable. You need one that has Audio Return if you want to feed your Home Theater system with audio from the TV. There are several types of HDMI cable,some with audio return and some without. The two basic types (not including Ethernet) are described below - you need the High Speed version, which does have Audio Return.

HDMI Standard This is the most basic HDMI standard which all cables have to meet. Cable should contain all the connections required for HD transmission, and have to deliver at least a resolution of 720p, (Video mode of 1280 x 720 meaning 720 Horizontal lines). These cables do not contain an Ethernet connection, or audio return.

HDMI High Speed HDMI High Speed cables will support higher resolutions of 1080p. This means at least 1080 Horizontal lines, and cables rated at this specification may well support high resolutions of up to 4096 x 2160 (2160 Horizontal lines), check individual cables specifications for this data. Cables in this specification will also support a data transfer speed of 10.2Gbs (not to be confused with ethernet data speeds which are different), and a clock speed of 320Mhz. These cables do not contain an Ethernet connection, but do include an Audio Return Channel.