1. First, go to "Settings" - click on "Local Info";
2. Use the remote control arrow keys to type in "Up, down, left, right, left, right", not "up, down, left, right, left";
3. Enter the "Factory Mode" and select Advanced Settings";
5. And then will be prompted to enter the password, Note: TV models: 42K1, 42K1T, 42K1Y, 42K1TY, 55K1, 55K1T factory menu of the Advanced Settings can be turned on the ADB switch, enter the password " 123456" can be entered. 123456" to enter, TV models: 40K1Y, 49K1Y, 49K1C factory menu of the other settings within a "Adbd Enable", the parameters behind the change to 1 can be;
6. After completing the selection of Select "ADB Switch" and turn it on to install third-party references.
Select "ADB Switch" and turn it on to install third-party references.