It's a double blink on the Rx when it's binding. The fast flash means wi-fi configuration mode has been enabled.

Holding the boot button on the Rx for 10 seconds should reset it. I prefer the power it on with a battery 3 times. (pause for each for about a second: on-off-on-off-on)

Watch out if you enabled model match or configured a passphrase. Those can cause it to look like your bound, but then nothing happens when you try to use it.