Ensure your TV is connected to a stable Wi-Fi or Ethernet network. Press and go to Settings (gear icon) . Select Device Preferences > About > System Update .

remains robust across firmware versions, allowing you to replicate settings across multiple compatible TCL sets easily. Media Support

Most EP660 models use the RT51 (RT2851) chassis.

If an update is found, follow the on-screen prompts to download and install. Method 2: Manual USB Update

Reinstalling firmware will wipe all user data and apps. Do not turn off the power during the installation process.

Select to see the current Software Version. 2. Automatic (OTA) Update Method