Here is the process to reset your NVRAM settings:
- Write down your autopilot gain settings
- CHECK -> MAINT -> ADMIN -> Hold CALIBRATION
- SELECT into Admin Settings
- NEXT down to Administrator Mode
- ADJUST the number to 1010
- NEXT down to Set Clock NVRAM Defaults
- SELECT to RESET
- PREV to Administrator Mode
- ADJUST the number to 1011
- SELECT to clear admin mode (Remaining in Admin mode is unsafe. All sorts of things happen without user interaction)
- RETURN to EFIS mode
- Re-enter your autopilot gain settings