I have an MDBH968AWB3 and it wont start. All settings can be chosen and they light up except Delay start, Start, and Cancel

SOURCE: Maytag Dishwasher will not start.

I had the same problem. The plastic wiring strip that connects the touchpad had corrosion from water. The panel would need to be replaced, because they don't sell the touchpad separately. (around $50 - $70 USD)

SOURCE: No Water in. Will not change wash cycles

There was soap particles caught under the float valve. Thanks.
Jim

SOURCE: whirlpool dishwasher adp 5966 6th sense delay start problem

you hold in the start button untill it goes off

SOURCE: eidw6105gs1 flashing lights across the

error code e4

SOURCE: MDBH968AWS3 THE AUTOWASH BUTON WILL NOT LIGHT AND IT WONT START

Lemme guess: First only one key failed, but OK, so we just use another setting. Then another key, then all keys but, say, AutoClean, but no Start, right? There is a ribbon cable connecting the keypad to a circuit board that corrodes from moisture, despite being "sealed" in a plastic sandwich. Imagine, moisture inside a dishwasher! As the corrosion progresses, it eventually breaks the connection to each key. Clearly a design flaw--Maytag has replaced this cable twice now (under warranty) in my first year of ownership, yet they continue to replace with the exact same part, and it fails in the exact same place each time.I fully expect this one to fail within six months or less. Only thing left is BBB.