A popup should automatically appear stating "USB update ready" or similar. Select or Install to begin. Completion and Restart
If you cannot find a safe v3.51.01 file, consider leaving your TV on its current firmware. LG never released a critical security or performance patch for this model after ~2010.
Version 3.51.01 and newer versions like 3.55.01 typically address digital tuner stability and HDMI handshake issues common in older LCD sets.
To update your to the latest firmware (often v3.55.01 , which succeeds v3.51.01 ), you must use a manual USB method because this older LCD model lacks built-in Wi-Fi. Preparation