The first thing I would check is 120V at the power outlet and the plug connection.
Remove the bottom panel and check for burned wires at the junction box.
Check for reversed polarity at the power cord connection to the dishwasher.
Reversed polarity means the hot power cord wire connected to the neutral dishwasher wire and the neutral power cord wire connected to the hot dishwasher wire.
Reversed polarity could cause a damage to the control board.
If there is nothing wrong then check the thermal fuse, located on the control board box.
If this is not the issue then replace the control board.
Does it have a “lock-out” feature? I had a Whirlpool a couple days ago that had that and it was “locked out”. Note on control panel tells you what to do to lock out and to release control panel. Mine was hold the button for five seconds and it reset and was OK.