Oven display is blank or flickering, but interior light may still work; buttons may not respond.

Warning: The control PCB has exposed mains and low-voltage circuits. Only proceed if you are experienced with electronics. Always disconnect power first.

• 1. Confirm power supply: Check that the oven’s interior light and door switch operate. If they do, mains power is present but the control electronics may be down.
• 2. Access control PCB: Remove the top cover or control panel to expose the main control board.
• 3. Visual inspection: Look for bulged electrolytic capacitors, burnt resistors, or cracked solder joints near the transformer or switching power supply section.
• 4. Check connectors: Ensure the harness from the power input to the control board is fully seated. Reseat any low-voltage connectors going to the display PCB.
• 5. Component-level repair (advanced): A technician can test the low-voltage outputs (e.g., 5 V, 12 V) with the board powered and safely isolated. If no output is present, the board or its power supply section is faulty.
• 6. Replace board if needed: For most users, replacing the entire control PCB with a Panasonic OEM part is the practical solution.