Gary D Parsippany , NJ January 09, 2016 Appliance: Samsung Dishwasher DMT800RHS/XAA Samsung Dishwasher Dmt800rhs/Xaa / : I have a samsung dmt800rhs dishwasher that the key pad wouldn't function. How to replace Window-Panel Hidden. I downloaded the service manual and followed the troubleshooting guide. It said it was either the main circuit board or the keypad itself which also has a printed circuit board . After following the step in the service manual. I disassembled the door and inspected the keypad where I determined the circuit board on the keypad had evidence of corrosion and arcing This type of repair requires a digital multimeter to check voltage and a torx screwdriver 6 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes