Place the NutriBullet powerbase on the table so that the three rubber screw covers are visible along the bottom of the well. Remove the covers using either tweezers or your fingers.
Turn the NutriBullet powerbase upside down and remove the plastic casing by lifting it up. You may have to wiggle the casing in order to break away any hardened material.
Determine which activator(s) fail to work by applying pressure to them. Then, remove the two 15mm screws that hold the activators in place by using the Philips Head 2 screwdriver.
Only two of the three activator tabs have green micro switches that actually turn on the motor. Use a circuit tester on the power chord and press the two micro switches simultaneously to see if they complete the circuit. If not, one or both need to be replaced.
Open up the green switch. The metal tab and black button will fall out. Fiddle around with the metal switch on the inside to snap it back into place and then reassemble carefully. It should make a clicking noise.
Before reassembling, you should clean up any material that has accumulated on the various parts. Be sure to keep water away from the motor, switches and other electrical components.