I would think you would be able to do a factory reset to the miner. Typically there is a small hole on the miner where you can insert a pin into it and hold down for 30 seconds while the miner is booted. Otherwise I would try swapping out the ethernet cable and connect it to a different port on your switch/router.
Do you have the exact location of that reset button? I don't see it.
Nowhere on the net is info of such a button, are you sure it's there?
The switching of cables/port is the first thing I tried.