WHIRLPOOL UNTERCOUNTER QUIET PARTNER V DISHWASHER -- START / RESUME BUTTON NOT WORKING -- ALL OTHER BUTTONS CAN BE ILLUMINATED !

What I've done so far..

1) shut off / on breaker
2) cleaned the drain screen
3) checked the float operation
4) checked for obstruction with wash arms
5) replaced control board
6) run diagnostics --
6a) washer runs through wash cycles and then stops dead -- no lights nothing-- I open the door to find compartment hot and suds at bottom --

--no blinking lights or any other indication on the panel to direct me to the source of trouble -- suds tell me it seems like dishwasher won't go to rinse cycle --

Out of ideas --- family pressure to purchase new dishwasher

Trouble free for 4 years until now...
Please help -- new to Forum -- where can I get diagnostics literature ? my washer has no kick panel -- where I would usually find that material