Kenmore Microwave/Oven Start Button Not Working

This past weekend, the start button for the stove on my Microwave/Stove combo stopped working. Every other button works.

Do I need to replace the entire Oven Control Board:
Oven Control Board WB27T10091 Order now for same day shipping. 365 day return policy. RepairClinic.com
?

BTW, sorry if this is in the wrong section, I put it here since all of the controls are on the microwave itself.

Thanks,

Jeremy