First, unplug it. I know, I sound like your dad telling you to turn it off and on again. But electricity + water + your shaky, coffee-deprived hands = a bad time. Give it a full 30 seconds to reset itself.
Now, check the water reservoir. Is it sitting flat? I once spent 20 minutes troubleshooting a “dead” machine only to find the tank was crooked by a millimeter. Push it down firmly until you hear a click. Then, take the reservoir off, rinse it, and fill it with fresh, cold water. Not hot, not yesterday’s leftovers. Fresh water. Your Keurig has feelings about water quality, apparently.
