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We see this problem frequently. It sometimes causes intermittent operation or an error code to be displayed.
Many different models of ovens
Intermittent operation of oven buttons, sometimes results in a keypad related error code.
Carefully release the locking tabs on the zero-insertion-force connector that holds the keypad ribbon.
Pull lightly on the locking tabs in the direction away from the pcb.
Next check for oxidized contacts on the membrane tail.
These contacts on the membrane are oxidized and cause poor electrical connection to the control board.