" PROBLEM: WON’T RUN AND LED ABOVE KEY(S) IS FLASHING RAPIDLY
Stuck key(s) or shorted circuit(s) in keypad. Shorted circuits or connections on the control that read the keys."

Pressing the following option keys in the sequence shown will either start the
Diagnostics Cycle or turn on the Rapid Advance feature for stepping through
customer selectable cycles: HIGH TEMP WASH ⇒ AIR DRY (NO HEAT DRY)
⇒ HIGH TEMP WASH ⇒ AIR DRY (NO HEAT DRY) If the above key sequence is entered with the dishwasher in Standby, the Diagnostics Cycle is started. The Diagnostics Cycle can be rapid-advanced, interval by interval, by pressing the Pots & Pans/Anti-Bacteria or Heavy/Pots & Pans key.

After you conduct the diagnostics cycle, you'll know if the control board or the keypad is the issue.