The cable box that provides content on the Rep Wall TVs is located in the Server Rack in the Server Room.
The box can be rebooted using a Spectrum Cable Box remote.
You can also reboot by unplugging power, waiting 15 seconds, and plugging power back in. The cable box will not auto-power on, so after doing this ensure to power on the cable box with the Spectrum Cable box remote, or the power button on the front of the cable box.