1. Supply your receiver with power but keep the switch in the "off position".
2. Use a paper clip or something similar to hold down the R2 button on the side of the receiver. While holding it, flip the power switch to the "on position". Let go of R2 once the receiver has turned on.
3. In this mode, do a full firmware update of both Radios using Paralinx Manager.
Note: If you encounter issues updating the receiver successfully on a Mac, please see here.
Transmitter (Stuck booting without any blue lights on):
1. Hold L and plug in power to the transmitter (let go of L once it's on).
2. Connect the transmitter to the computer and update both Radios using Paralinx Manager.