Hello, my name is Rusty. Your last tech seems to be offline. I can help you get your system running.
First, let's connect your Sky box to your TV. Connect the screw in coax cable from your Sky box output to your TV.
Next, let's connect your DMP-BD79. Use an HDMI cable, and connect the output of your BD79 to your TV's HDMI 1.
You should now be able to view both devices on your TV. Use the AV button on your remote control. Press it repeatedly to choose TV or HDMI 1. Some model TVs require that you select the input, then press OK (Enter) to select it. Your Sky box will show on TV, your BD79 will show on HDMI 1.
Now to get your sound bar working. Use an optical cable with the square (ish) ends. Plug one into your soundbar, and the other into your TV's digital audio output.
To get your sound bar working, first select the optical input. If you're not hearing anything, it's because we need to activate your TV's optical audio output. Go into your TV's menu, and go to the audio menu by using the down arrow. Press the right arrow to access that menu. Scroll down to SP/DIF, and make sure it is set to Auto.
Your system should be working at this point. Please let me know if there is anything that isn't working, and we'll adjust accordingly.