How do I connect the lg300w soundbar to the Panasonic viera tx-p50x60b

Here are steps to connect a Samsung soundbar to a Sanyo FVM3982 TV using an optical cable:

1. Locate the Optical Out port on the back of the Sanyo TV. This port will be labeled "Optical Out" and is usually covered by a small protective cap.
2. Remove the protective cap from the Optical Out port and plug in one end of the optical cable.
3. Connect the other end of the optical cable to the Optical In port on the Samsung soundbar. This port may be labeled "Optical In" or "Toslink".
4. Turn on both the TV and the soundbar.
5. On the Sanyo TV, use the remote to navigate to the audio settings. Look for an option to set the audio output to "External Speakers", "External Audio", or "Optical Out". Select this option.
6. Adjust the volume on the Samsung soundbar using its remote control.

Once these steps are completed, the sound from the TV should be played through the Samsung soundbar. If you encounter any issues or don't hear any sound, check to make sure that the soundbar is set to the correct input and that the volume is turned up. Additionally, make sure that both the TV and soundbar are properly connected and powered on.

Optical leads have a red light that shows even when unplugged. If that is not on the socket is switched off.

You will need an optical digital audio connection for the TV and the TV will have to be fitted with a compatible "optical digital audio" OUT connection.
The soundbar unit you have does not have an HDMI connection so you only have the one choice with cable..
Any electronics store selling cables will fit you with the correct one.
The one pictured here next to the HDMI cable is the type you need (aka Toslink) but if you don't have an Optical digital Audio Out connection on your TV you have a problem.
HDMI vs optical Which digital audio connection to use CNET

If your TV has an optical port on the back, you simply get an optical cable long enough to connect the two. On your TV sound setup screen you'll have to select optical out so the sound from the TV will be switched from the RCA jacks to the optical out port.

hook your dvd player up to the tv via hdmi, then take the optical audio output from you tv to the soundbar. Make sure to enable to audio output jack in the tv setup menu as some manufacturers disable this jack by default.

If you have connected the optical cable then you should be able to select AV using the TV remote, keep pressing until you hear sound from soundbar!

This television only outputs digital audio called PCM / Dolby Digital, Fiber Optic so you may need an amplifier that has a digital in port (if the speakers are rca red and white cable plugs then the amplifier needs rca output ports). Then you would need to connect the amplifier to the speakers
. Unless the speakers have a digital in port which I am unsure on ,. The digital out audio port on your tv uses a fibre optic digital audio cable..
page 13 of the user manual shows this digital output port.
http://service.us.panasonic.com/OPERMANPDF/TCL42E50.PDF

Connect the soundbar either to the TV's optical output. Or use an Optical to stereo phono/RCA converter box and then a pair of stereo phono cables (red & white) to the soundbar.

If it's a very basic soundbar with just a headphone jack input then you can go from the TV's headphone output instead.

As for the Sky box, just leave it connected via either an AV lead or better still a HDMI cable direct to the TV. The TV will send sound out to the soundbar.

I have a pansonic tv that i brougt last winter ,All you have to do to get audio from it is use a optical cable,

Just select the input button on the set, or the remote until the input your on is selected.