Many people are wondering how you can reboot or what’s called a soft reset of your WebOS smart TV. For some reason, LG doesn’t provide directions in their help section or in their manuals. Just turning the TV off doesn’t reboot WebOS.
Instead of unplugging your TV just to restart it, all you have to do is press and hold the volume down and power keys simultaneously until the device reboots. This will take about 11-12 seconds. Then release the keys when you see the LG bootup logo. That’s it! This will not reset your TV but will just reboot the OS. This is extremely helpful if the TV is stuck in some unwanted state.