Model Number: KGSC308LSS0
Brand: KitchenAid
Age: More than 10 years

The control panel for the oven has become very intermittent. Must hold finger on key for any seconds to get a response, and often the response is wildly different than the key being pressed. Have replaced BOTH the keypad and the controller board, and the problem persists! Any ideas for what the source of problem could be?