Keypad error not resolved by new keypad

Oven/Range/Cooktop Repair
,
1

Brand:Kitchenaid
Model Number:kgrs807sss00
Main Symptom:F2E1
What happens & when: Error Code F2E1 appears shortly after start up. keypad is inoperable

Error Code (if any):F2E1
Parts or tests already tried: new keypad, new control board
Photos / video link:

2

You should have replaced the switch membrane, WP9761566 Oven Control Panel Touch Pad | Genuine Whirlpool OEM In Stock, and the main control, WP9762794 Oven Electronic Control Board | Genuine Whirlpool OEM In Stock, let me know if this is what you replaced. Thanks.

3

I replaced the keypad and control board (bought from you guys). No change. I am suspecting the ribbon cable that connects the two