Microwave displays E7 and will not start; sometimes occurs after a power surge or outage.

Safety first: Unplug the microwave before opening the cabinet.

Reset procedure:

• Unplug the unit for at least 5–10 minutes to allow the control to fully reset.
• Plug back in and check if the error clears. If it reappears immediately, proceed to inspection.

Inspect control connections:

• Remove the control panel and access the main PCB.
• Verify all harness connectors are fully seated and locked. Look for signs of arcing or burn marks on the board.
• If the unit experienced a surge, inspect the line filter and any onboard fuses or MOVs for damage.

Resolution: If E7 persists after reseating connectors and a full reset, the control board is likely defective and should be replaced. Due to the need to match Emerson model-specific boards and transfer wiring correctly, many users should have a technician perform this repair.