Often it is the moving parts that wear out 1st in electronics, like switches, motors etc

or electronics may fail because they are subject to heat and vibration.

Over time the variable vanes on the turbine can get coked up, untill they sieze or the movement is restricted, this can have a knock-on effect on the actuator rod, and on the electronic actuator - which can burn out (whether its the motor or the circut that burns out 1st, i don't know)

it is worth checking the rod/ vanes operate as they should - or you may pop another electronic actuator