DIAGNOSIS A completely dead control panel usually points to a power supply issue, not a failed touchpad. It's likely a tripped thermal fuse on the main control board or a problem with the incoming power.
FIX First, check your home's circuit breaker or GFCI outlet that the dishwasher is plugged into. Reset it. Then, ensure the dishwasher's power cord is firmly plugged into the outlet (it's usually under the sink).
IF THAT DIDN'T WORK The issue is internal. On this model, a common failure point is the thermal fuse on the main control board blowing due to a short or overheating. This requires a multimeter to test and a repair kit to replace—it's not a user-serviceable part.
HEADS UP If you're handy and open it up, always disconnect power at the breaker first. Messing with the main board with live power is a great way to fry the board completely or give yourself a nasty shock.