Connect an old Lenoxx sound home theather system to HDTV Element

[Charles_173]

I have an old Lenoxx Ls Home theater system trying to connect to flat screen HDTV Element. Has 3 audio jacks red,white,yellow. Component red,blue,green.

 

[americanaudiophile]

The jack on the TV you refer to are inputs. You need an audio output.
Without the model number of the TV and HTS I can't tell what connections you have available.
Most common audio output on TVs is digital optical audio. If the HTS has that input use it. Check the TV manual on how to use the optical output as it may not be active by default,
If the HTS only has analog audio input you would need an optical to analog converter.