It is the connector for the OPTICAL cable to plug into.
If your TV has a digital audio output, connect it to the optical or coaxial digital input of the surround receiver. This will pass through the digital audio signal sent from a HDMI input at the TV.
There are essentially two ways to get surround sound out of the Xbox. Via HDMI or via optical (TOSLINK) out. If you have the component video cable, then the end that attaches to the Xbox has an optical out port. Simply attach this to the optical in on your home theatre receiver with an optical cable. If you want to use audio via HDMI, in order to get surround sound you'll have to have an HDMI receiver capable of receiving audio. In this case run the Xbox via HDMI to the receiver and then the receiver via HDMI to the TV. The HDMI will send both audio and video. If you have the official Xbox HDMI cable you can also connect the HDMI cable directly to the TV and use the optical out connector that it comes with instead.
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.
An optical disc drive reads a disc by shining a laser on it and detecting the reflected beam. The reflectivity of a disc varies across its surface, which determines the intensity of the reflected beam. Photodiodes detect this reflected beam and produce electrical signals, which are interpreted as data.
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 your Apple Tv has a female HDMI port and the device you are connecting it to also has an femaleHDMI port.
Port Charles
The VGA port, it's the blue trapezoid shaped port.
I don't know of any TVs that have an OPTICAL OUT on the back. The connector for this kind of connection has a locking type socket, and will only go in 1 way.
I believe optical audio cable is the best choice for your tv system as long as you will be able to connect it properly to yout tv system and you got all you need.
No.... It must be output to input...
Unless your Bose speakers have an optical digital input, no. There is no audio outputs or speaker outputs on this TV except for optical.