If your LG 49LF630V is frozen and nothing happens when you press the buttons you can try to soft reset it. Follow this easy guide on how to perform the soft reset on LG 49LF630V. This operation won't affect any settings and data on your device.
Let's begin by unplugging your LG 49LF630VTV from the power source.
Wait for a few minutes.
Then turn the TV on by pressing the Power button on the remote controller.