Client Initialization / "red x 3" errors when using my friends spare receiver

I was given a brand new Cisco spare receiver, same unit as the one in my bedroom, and want to use it in another bedroom. I attempted to test it first by swapping it with the unit in my bedroom since they are identical. When I first powered the unit I received a client initialization error. I've  power cycling and then a hard reset. After the reset process is finished, the screen displays the "red X" with the number "3" error message. What can I try next?