The process of factory resetting your LG webOS device will differ depending on which webOS version your device is running.
How to find your webOS version
Option 1: From the Signagelive Settings Menu
With Signagelive running on your LG webOS device, press the Yellow button
When the Info Pane appears, look for the webOS version field
Option 2: From the native LG Settings Menu
Press Settings on your LG remote control
Head to General > System Information
Look for the webOS version field
How to factory reset LG webOS 1.0, 2.0, and 3.0 devices
Hold the Settings button on your LG remote control until a chat bubble appears in the top right-hand side of your screen
Enter 0,0,0,0 followed by the OK button
On the Signage Setup menu, scroll down and select Factory Reset
How to factory reset LG webOS 3.2, 4.0, 4.1, and 6.0 devices
Press Settings on your LG remote control
Head to the Admin menu
Toggle Admin mode to the ON state (the default password is 0,0,0,0,0,0 if this has not been previously changed)
Select Factory Reset
Select Confirm
Please Note
If you're reinstalling the Signagelive application following a factory reset, the Player will need to be deactivated within Signagelive in order to display a new Activation Code