Obviously, the first step is to swap the R2LC with a known good one, it's a simple socketed board. The DCDS is frequently more complicated to swap out and test.
Testing the motor isn't a bad idea, you can do that with a DC power supply by unplugging the large 6-pin black plug from the DCDS and then connecting the DC supply directly across the motor. It's much more revealing to have a DC supply with variable voltage and current metering to determine the health of the motor.
