Safety First: This troubleshooting can be done with power on; do not remove panels.

Select a cycle: Choose a full cycle and any options, then press Start/Resume once and close the door within the required time.
Check door latch: Ensure the door closes with a firm click and does not spring back.
Reset controls: Turn the dishwasher off, then back on. If available, perform a control reset sequence from the user manual.
Try different buttons: If some buttons do not respond, the UI may be failing.
When to call for service: If the unit beeps but will not start, or Start is unresponsive, the user interface or control board may need replacement.

Dishwasher powers on but will not start a cycle when Start is pressed.

Possible Causes