The platform will tilt down but not up from both stations. The strange thing is both switches seem "reversed". The platform tilts down when the switch is flipped "UP" on both stations. I checked both switches and they seem OK. When the tilt switch is moved "down"on both stations the engine speed ramps up but there is no movement of the platform. There is no error code from the ground station but the platform flashes code 3-4. The connectors don't appear corroded and the wires are not spliced. Thanks in advance for any help.