E9 is displayed and the cooker does not respond to program selection or heating.

Safety first: Unplug the cooker before opening any covers.

• Power cycle: Disconnect from mains for at least 10 minutes to fully discharge internal capacitors. Reconnect and test.
• Check for moisture: Inspect the exterior and control panel for signs of liquid ingress. If the cooker was exposed to steam or spills, allow it to dry in a warm, ventilated area for 24 hours (unplugged).
• Inspect internal connections (advanced): Remove the top or side cover to access the control panel. Verify that the ribbon cable between the display board and main PCB is firmly seated at both ends.

When to call a technician: If E9 persists, the main control board or display board likely needs replacement or reprogramming, which should be done by an authorized ETA service center.