I began by diagnosing the issue with the LG washing machine, which was displaying an error code. After confirming that the user interface was the source of the problem, I carefully disassembled the machine to access the control panel. I then replaced the faulty user interface with a new, compatible part. Ensuring all connections were secure, I reassembled the machine and tested it to confirm the error code was resolved. The washing machine now operates smoothly, with the user interface functioning correctly. This meticulous process restored the appliance's functionality, ensuring it meets the customer's needs.