Slayer: Servos doing nothing at all when turned on.

New batteries.

Have 6.5V going to the 2216 receiver. Have voltage coming out of receiver on all channels.

Have a known good transmitter, and new crystals installed

Have tested fault with another 2216 receiver, and nothing.

Any good ideas?? Vehicle worked fine when boxed up a while back.

Slash: mamba setup, everything comes on and works as it should. Except that in either forward or reverse it just lunges and then stops. Do I just need to plug it into the laptop and tune it? Never have done that.