Wine cooler shows E7 and interior lights or fans may not operate correctly.

Safety: Turn off power at the breaker or unplug the unit before accessing the rear panel.

• Check wall outlet: Verify the outlet supplies the correct voltage (typically 120 VAC in North America) using a plug-in tester or multimeter. Avoid using extension cords or power strips.
• Inspect power cord: Look for cuts, kinks, or burn marks on the Monogram power cord. Replace the cord if damaged.
• Access main control board: Remove the rear lower panel to expose the main control board. Check that the incoming power connector is fully seated and not heat-damaged.
• Check low-voltage outputs: With the unit unplugged, visually inspect the board for bulged capacitors or burnt components in the low-voltage section. If you are qualified and have a multimeter, you can carefully measure DC outputs (e.g., 12V, 5V) with power applied. If voltages are missing or unstable, the board is likely faulty.
• Disconnect loads: To rule out a shorted fan or LED driver, disconnect low-voltage loads one at a time (evaporator fan, condenser fan, interior LED harness) and see if the E7 code clears after a power reset. The component that, when disconnected, allows normal operation is likely shorted.
• Replace failed part: Replace the main control board if the power supply is defective, or replace the shorted low-voltage component identified.

If you are not experienced with live electrical measurements, have a professional perform these checks.