This method applies to all ANTMINERs.
To power off/shut down a miner:
As the miner is directly connected with the PSU and there is no hard switch on the miner, all you need to do is to pull the PSU power plug (by pulling the plug, not the cord) to disconnect the power.
To restart/reboot a miner:
There are two ways to restart the miner; first is to power off the miner and then power on again; the second is to click “Reboot” in the miner user interface as below:
Miner backstage > System > Reboot