Whirlpool dishwasher won't turn on. The...

Make sure there's power getting to the dishwasher. Check for a tripped circuit breaker or a blown fuse. Check the wall socket for power. Sometimes the power cord disconnects at the dishwasher (inside the junction box, behind the bottom kick panel), if this is the case, the wiring must be repaired or replaced.

If everything stated above is ok, this will lead to a failed control sector. The control sector can be a timer module, or control board assembly.replaced the control sector if all above is ok.