Customer Questions and Answers for Main Control Board (Pcb Assembly) by Lg

This main control board is the electronic brain of your appliance. It supplies regulated power and coordinates sensors, user inputs, and components so cycles run correctly—restoring dependable operation when the original board fails.

• Distributes and regulates power to key components
• Interprets signals from sensors and the user interface
• Executes operating logic, timing, and safety routines
• Typical failure symptoms: no power, won't start, dead/flickering display, relay clicking, erratic cycling, or error codes traced to the main PCB

• Disconnect power before servicing; handle the PCB by the edges and follow ESD precautions
• Photograph wire/connector locations; transfer any jumpers/spacers from the original board if present
• Seat connectors fully and mount the board securely to prevent shorts or vibration
• Some models require control initialization or service-mode steps after installation—refer to the service manual