Oven does not respond to touch controls, display may be lit but keys do not work or respond intermittently.

Safety first: Disconnect the oven from mains power by unplugging it or switching off the circuit breaker before removing any panels.

• Check for panel lock: Some Princess ovens have a child lock or key lock. Consult the user manual and try the lock/unlock key combination to ensure the panel is not simply locked.
• Clean the touch surface: Wipe the glass touch panel with a soft, slightly damp cloth and mild detergent. Dry thoroughly. Grease or moisture can prevent capacitive keys from responding.
• Power reset: Turn off power at the breaker for 5–10 minutes, then restore power. This can clear minor communication glitches.
• Inspect ribbon cable: Remove the front control panel (usually by removing screws behind the trim). Locate the flat ribbon cable between the touch panel and the control PCB. Reseat it firmly and ensure there is no corrosion or damage.
• Check for visible damage: Examine the touch PCB and main control board for burn marks, cracked solder joints, or corrosion. If the touch panel membrane is cracked or unresponsive in specific areas, it likely needs replacement.

If the problem persists after reseating cables and resetting power, the touch control panel or main control board should be replaced. This involves working near live circuits and sharp metal edges; if unsure, contact a qualified technician.