It's disappointing to bring home a new RC or dig out one that's been in the toy box for a while only to discover that when you press a button or turn a wheel on the transmitter nothing happens. Fortunately, a lot of the time the problem is an easy fix -- like making sure the RC and transmitter or turned on or that the batteries are good. From the obvious to the not so obvious, here's what to do when your RC won't respond to commands from the transmitter.