Dont have a Lynx myself, but if its like the Walkera#4 and others (BCP, BCPP, Falcon40) with respect to the RX, please note:

In order for the RX (and internal ESC) to arm the throttle lever and TRIM must be full down. Does not make sense to put the trim all the way down, but that is what is required. It has stung alot of people who thought that the RX (and/or) TX was dead, but was infact the RX(and esc) not arming. Do your servos work, just not throttle?

May or may not help, just thought I would mention it.

Michael
USHobbySupply.com