Main drive motor does not operate.

We have had this machine 6 years now and it has operated faultlessly.
Until yesterday. At first it appeared only to be agitating with no spin.
However after checking the belt drive and testing the "brake" solenoid out OK I'm pretty sure it was not agitating either i.e. no main motor operation.
Everything else appears to operating OK e.g. water fill solenoids, water level switch and purge pump.
I'm not at all familiar with the motor windings and agitator oscillating systems so can't really diagnose further. I suspect either the Timer Controller unit at $140 replacement or what I take to be a solid state switch which might or might not control motor reversal (oscillation).
Any thoughts anyone.

Thanks