If you own the or ML-2165W and cannot access a Windows PC, you can attempt a network-based firmware reset via the SyncThru Web Service:
Press and hold the button (or Print Screen/WPS button on "W" models) for approximately 10–15 seconds until the LEDs flash rapidly. Release the button and wait for the printer to reboot. Network Reset ( firmware reset samsung ml 2160 2165 2160w 2165w link