Do you have an unobstructed view of the sky in the direction of the sats?
Take the cover off before you power it up. Then power up and watch the antenna. Mine starts rotating in a counter clockwise direction until it reaches the handle area (handle pointed north). Then it rotates clockwise a full turn until it reaches the handle again. Then it rotates back until it reaches a generally southern direction (western arc sats position for my location). Then it starts a series of very small movements up and down and side to side homing in on the three sats. Sometimes it ends up pointed east and I have to restart it a time or two before it points south and finds the sats. That will tell whether the antenna is moving correctly. If it does go thru these movements and never finds the sats there may be a problem in the electronics.