Mine had the same problem ... all the lights are on, grinding works fine, but no heat on the plate, and no dripping of water.
After a weekend on the workbench, I mastered this machine. The KM7005 has 2 x MicroTemp G4 thermal cutoff (TCO) fuses which interrupt the Live line, for overheat protection. Mine didn't overheat per se, but the TCO blew anyway. Not reset-able ... need to be replaced with a soldering iron. To date, I have helped 13 people on this site fix this exact problem.
I'll be happy to advise you to fix this, or fix it for you. Write me at
[email protected].