Hi WDNJSQ,
Yes. Run the following command:
Run the power on slot slot-id command in the user view to power on the specified board.
Run the power off slot slot-id command in the user view to power off a specified board.
However, the AR100&AR120&AR150&AR160&AR200 series, AR2201-48FE, AR2202-48FE, AR2204-27GE, AR2204-27GE-P, AR2204-51GE-P, AR2204-51GE-P, AR2204-51GE, and AR2204-51GE-R do not support this command.
I hope it helps!