If the TRX+ is set as a slave via RF or other external connection, the LED (2) will flash momentarily on startup to indicate "resync to master". This is a normal function of the TRX+.
If the TRX+ is set as a slave via RF or other external connection, the LED (2) will flash momentarily on startup to indicate "resync to master". This is a normal function of the TRX+.