Brian D Mount Olive , AL June 01, 2015 Appliance: Whirlpool Undercounter Dishwasher WDT790SAYB2 Whirlpool Dishwasher Wdt790sayb2: It was dead like no power. How to replace Dishwasher Control Board. I did a little research on the internet. I check to make sure it was getting power with Ohm meter. I took the front panel off to see what I could find. I found 2 dead roaches in the control board box and there was some brown stuff on the control board. I checked the price to replace the part online and local. AppliancePartsPros had the best price and return policy. I figured I had nothing to lose be trying the part out to see if it would work. I installed the new board and it was alive again. Thank God! 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 15-30 minutes