wirlpool range wont start

[SIZE=4]So ive got the use of the range and all of the buttons on the control panel work except the start button. Im wondering if i need to replace the control panel, or the membrain switch? Or, both? I have removed the cotrol panel to find nothing burnt, or corroded. I love this unit and untill now i have had no problems. Thanks for the replies in advance. Verne Smith [/SIZE]