Here are your parts
Replacement parts for MAYTAG MDB8851AWS10 Undercounter Dishwasher | AppliancePartsPros.com

Here is the tech sheet
http://www.servicematters.com/d...atic%20-%20W10128608.pdf

All the cycle selections of the control panel touch pad stopped working.
My dishwasher will not run with the 'norm', 'light', 'rinse' or 'heavy wash' touch pad selections. None of these lights come on anymore.
It only will function on the 'Auto Wash' touch pad selection.
Looks like they all use Pin 9 as the common so this may be the problem.
Auto uses a different pin.

I would do the following connector cleaning.
Pay special attention to the ribbon cable Pin 9 track.

If this does nothing then I would check the keypad with a meter. If OK then the control board is the likely culprit but is is still a bit of a crap shoot.

Connector Cleaning / Checking
Unplug the unit
Open it up
Remove the ribbon cable from the keypad to the control board at the control board.
Clean the edge connector.
If it is the type where there is not a connector just the insulation is removed, it can be cleaned with a pencil eraser. Do not use an ink eraser as it is too abrasive.
Check the tracks in the ribbon cable for hairline cracks. A magnifying glass helps here.
Would not hurt to clean the connector on the board. Use electronics contact cleaner or isopropyl alcohol and a tooth brush. Be gentle and do not reconnect till all the solvent evaporates.
Reconnect everything and give it a try.

After cleaning connector and ribbon wire my dishwasher still does as I first described, no led display and no action from any of the 'cycle selection' touch pads except the 'auto clean' pad. No small cracks, ribbon like new!

Here is the interesting observation:

I ran the Field service test after I had cleaned the connections and
all the LED's came on as described in the instructions and the 'heavy wash' led
is blinking during the test as described. LED's are at least operable.

Any thoughts?
Do you know why All the LED's would work during the field test, but not normally?
The number 9 pin must be good a connection - correct?

Thanks again, Tommyboy84

I ran the Manual test, It worked as described up to the point of the 'Normal wash' Key. It is dead- does not do anything- does not light up.
I had to cancel the manual test at that point.

All the cycle keys - don't do anything - other than 'Auto wash' Key...

I'm back to square one.

How do I test the Key pad? I test for continuity between the various pins
i.e. Pin 9 - Pin 6 for 'Normal Wash, Pin 9 - Pin 5 for 'Heavy Wash', Etc.?
I should have a completed circuit when the correct key is pressed .
I would be disconnecting the ribbon from the control board again and taking my measurements at that point.- correct?

Thank You again

I have filed a class action lawsuit against Whirlpool for their faulty control panels in their Whirlpool and Maytag dishwashers. Please contact my attorney Eppsteiner & Fiorica Attorneys, LLP at 866.548.8857 and let them know if you own or owned a dishwasher with control panel failures.

I have filed a class action lawsuit against Whirlpool for their faulty control panels in their Whirlpool and Maytag dishwashers. Please contact my attorney Eppsteiner & Fiorica Attorneys, LLP at 866.548.8857 and let them know if you own or owned a dishwasher with control panel failures.