Report as inappropriate

You can, at least, test the board logic parts - disconnect the powerr, switch the jumper in the middle of the board and cvonnect to pc. It is basically an arduino, so you should see serial communication ging on (lots of "wait" messages). Of course, this weill not tell you anything about steppers or stepper drivers. Btw, there is alslo a fuse in the PSU - check that one, too.