Display shows E7 and the refrigerator may not cool properly or may shut down unexpectedly.

Safety: Unplug the refrigerator before accessing the rear control compartment. Capacitors on the PCB can retain charge; avoid touching bare solder joints.

Steps:

• Power cycle: Unplug the unit for at least 10–15 minutes to allow the control to fully discharge, then plug back in and observe if E7 returns.
• Check supply voltage: Verify the outlet provides stable voltage within the range specified on the rating label. Avoid using undersized extension cords or power strips.
• Inspect the PCB: Remove the rear control cover and visually inspect the main board for burnt components, bulging capacitors, or darkened areas.
• Check connectors: Reseat all harness connectors to the board, ensuring none are loose or misaligned.
• Replace the board if necessary: If visible damage is present or E7 persists after reseating connectors and power cycling, replace the main control PCB with the exact Sharp part number for your model.

Because control board replacement involves handling sensitive electronics and sometimes reprogramming, many users should have this repair performed by a qualified technician.