E7 error on display and the interior light or other low-voltage accessories do not function correctly.

Safety: Unplug the wine cooler before accessing the control board or lighting circuits.

• Check interior light: Inspect the LED light strip or lamp inside the cabinet for visible damage, burn marks, or moisture.
• Disconnect suspect accessory: If the error appears when the light is turned on, unplug the light connector from the main board (with power off) and then power the unit back on. If E7 clears, the light assembly is likely shorted.
• Inspect wiring: Follow the accessory harness for pinched or cut insulation, especially where it passes through metal panels.
• Replace faulty accessory: Install a new Aobosi-compatible LED light strip or accessory module if it is shorted or physically damaged.
• Check board fuses: Some main PCBs have small onboard fuses for low-voltage circuits. Visually inspect and test with a multimeter. Replace only with the same rating if blown.
• If E7 persists with all accessories disconnected: The low-voltage regulator or driver circuit on the main PCB is likely faulty and the board should be replaced.