hi allan
'Motor Error ' on the Echostar usually means a disconnection between motor terminals and motor. Check motor cable run for continuity and wiring on motor (loose wires, corrosion etc.)
If you have an ohmmeter,disconnect the cable from the receiver and check for about 15 ohms between cable pair. If it's much lower than this, you could have a short on the motor.
Alternatively, the motor could be seized up.
Llew