have a 4 yr old Hayward Echostar pump.  when i turn it on it hums tries to turn over and shuts down with error msg. "check system pump has stalled"  the impeller turns as does the fan in the rear. the manual says. "indicates that the ddrive has lost control over motor shaft rotation, or that the drive was not able to start the motor after 3 attempts. motor connections to drive should be verified." not sure what that means do I need a new motor? sounds like the drive is separate from the motor