Call 650-912-1817 to describe the problem and confirm current availability.
Diagnosis comes first
It is difficult to price opener repair responsibly without knowing whether the fault is electrical, mechanical, sensor-related or actually elsewhere in the door.
Repair versus replacement
The age and condition of the opener, availability of replacement components, safety features and the cost of the specific repair can influence whether repair or replacement makes more sense.
Check the door too
Replacing an opener will not solve a door that is hard to move because of spring, track, roller or cable problems. The door should be evaluated as part of the decision.