1. Make sure that both your home theater system and cable box are turned off and unplugged from the power outlet.
2. Locate the HDMI input on the back of your home theater system. It will typically be labeled "HDMI In."
3. Locate the HDMI output on the back of your cable box. It will typically be labeled "HDMI Out."
4. Connect an HDMI cable from the HDMI output of your cable box to the HDMI input of your home theater system.
5. Once the HDMI cable is connected, plug your home theater system and cable box back into the power outlet.
6. Turn on your home theater system and cable box.
7. Use the input selector on your home theater system to select the HDMI input that you connected the cable box to.
8. Follow the on-screen instructions on your home theater system to complete the setup.
Once the setup is complete, you will be able to watch cable TV on your home theater system.