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If your home theater receiver has an optical audio input, plug it from the output of the TV to the input of the receiver.
If you want an audio output from the TV to connect to a home theater receiver or other amplifier, you will have to use the optical digital audio output or Audio Return Channel through the HDMI connectors. Those are the only outputs on this TV.
To connect a soundbar to a Toshiba CT90325 TV, first ensure both devices are powered off. Use an HDMI cable to connect the HDMI ARC (Audio Return Channel) port on the TV to the HDMI OUT port on the soundbar, or alternatively, use an optical cable from the TV's optical audio output to the soundbar's optical input. Once connected, turn on both devices and select the appropriate audio output setting on your TV to ensure the soundbar is used for audio playback. Adjust the sound settings as needed for optimal performance.
If your TV has a digital out, connect this optical output to the optical digital input on the Bose. If your TV doesn't have a digital out, you can connect the analog audio out (red and white) to an analog input on the Bose.
Connect the digital audio output of the TV to the optical input of the sound bar with the included optical cable.
Your TV will not have a optical cable input. The easiest way is to connect an HDMI cable from the Blu-Ray player to the TV. This cable will have both the video and audio together. If you do not have an HDMI input on your TV, use the component video output from the Blu-Ray player and the analog left and right audio to connect to the TV, or connect the optical digital output from the Blu-Ray player to a surround sound receiver for sound amplification.
If your television has an "audio out" or "monitor out" with an audio connection you will be able to connect the television to the desired input on the av receiver. Use standard composite audio (Red and White/Black RCA) OR if the audio output on the television is digital you will need a digital coax or optical cable.
To connect your Samsung Smart TV to home stereo speakers, you can use either an optical audio cable or an HDMI ARC cable, depending on your speaker system. For optical, connect the cable from the TV's optical audio out to the optical input on your stereo. If using HDMI ARC, connect the HDMI cable from the TV's HDMI ARC port to your stereo's HDMI ARC port. Finally, make sure to adjust the audio settings on your TV to output sound through the selected connection.
The LG LHB335 only has an optical digital inputs. If your cable box has an optical digital output, connect it to the Digital in #1 (TV) with an optical cable. If your cable box only has a coaxial (RCA) digital output and you want to use the digital audio connection, you will need to purchase a coaxial to optical digital converter. The Monoprice 2947 is less than $20.00.
Look for a connector labeled Optical out or Coaxial audio out on the back of the tv set. Your home theater system will need one of these same input connectors.
You can get an optical to coxial converter box if your receiver has a coaxial digital input. If it doesn't, you will have to purchase an optical digital to analog (D to A) converter.