To turn on an LG phone, press and hold the Power/Lock key for a couple of seconds until the screen lights up. This is the primary method documented by LG for all its devices, whether you are powering on a new phone or one that has been off for a while.
How to turn on an LG phone with the power button
The power button is the most reliable way to start your LG phone. LG’s official instructions state to press and hold the Power/Lock key until the screen lights up. This key is typically located on the side or back of the device, depending on the model. Once you see the LG logo or the screen illuminate, release the button. Your phone will then proceed through its normal startup sequence. This method works for every LG phone and is the standard way of powering your phone on and off. QuickMemo shortcut: from the Home screen, drag the Notification Panel downward and tap the QuickMemo icon to use it while viewing the screen you want to capture, then save the memo from the toolbar.
How to turn on an LG phone with KnockON (double tap)
Many LG phones support a feature called KnockON, which lets you turn the screen on or off by double-tapping the screen. This is a convenient alternative when you do not want to use the physical power button.
Enable KnockON
- From the Home screen, open the Settings app.
- Navigate to Gestures.
- Tap on KnockON and toggle the feature to the on position.
Use KnockON to turn on the screen
- Double-tap the middle of the screen with a fingertip (not a fingernail).
- The screen should wake up, showing the lock screen or your home screen.
Use KnockON to turn off the screen
- Double-tap an empty space on the screen or on the status bar.
- The screen will turn off and the phone will enter sleep mode.
Limitations of KnockON
KnockON works only on the Home screen provided by LG. It may not work properly if you are using a custom launcher or a user-installed Home screen. Additionally, the proximity/light sensor must not be blocked for the double-tap to be recognized. Tapping the very top or bottom of the screen may also reduce recognition accuracy. This feature is documented on specific models including the LG L64VL, LG L158VL, LG RS501, Optimus L70, G3 Vigor, Optimus Exceed 2, and L90, but may be available on other recent LG devices as well.
Troubleshooting tips
If your phone does not respond when you try to turn it on, follow these steps to identify and resolve the issue.
Phone not responding to the power button
- Ensure the battery is charged. Connect the phone to a charger and wait a few minutes before attempting to power it on again.
- If the battery is removable, take it out and reinsert it, making sure it is properly seated and the contacts are clean.
- Press and hold the Power/Lock key for a longer duration, up to 10-15 seconds, to rule out a brief press.
KnockON not working
- Verify that KnockON is supported on your specific LG model.
- Check that you are on the LG Home screen and not a custom launcher.
- Make sure the proximity/light sensor at the top of the phone is not covered by a case, screen protector, or debris.
- Use a fingertip to double-tap the middle of the screen; avoid using a fingernail.
Phone still will not turn on
- Try a different charging cable and power adapter to rule out a charging issue.
- If the phone shows no sign of life after charging, it may require service. Contact LG customer support or visit an authorized service center.
Frequently Asked Questions
What do I do if my LG phone keeps restarting on its own?
If your phone restarts repeatedly, try removing the battery (if removable) and reinserting it after a few seconds. If the issue persists, boot the phone into safe mode to check if a third-party app is causing the problem. A factory reset may be necessary as a last resort, but back up your data first.
Can I turn on my LG phone without the power button?
Yes, if your phone supports KnockON, you can double-tap the screen to wake it. If the phone is completely powered off (not just asleep), the power button is typically required to start it. Some older models may have a reset button or a combination of hardware keys that can power the device on.
How do I turn on my LG phone after the battery dies?
Connect the phone to a charger using the original cable and adapter. Let it charge for at least 10-15 minutes before attempting to press the Power/Lock key. A completely drained battery may take a few minutes before the phone responds.
Why is my LG phone not turning on even when plugged in?
This could indicate a faulty charging cable, adapter, or battery. Try a different charger. If the phone still does not respond, the battery may need replacement or the device may have a hardware issue that requires professional service.
Does KnockON work on all LG phones?
No, KnockON is not available on every LG model. It is documented on devices such as the LG L64VL, L158VL, RS501, Optimus L70, G3 Vigor, Optimus Exceed 2, and L90. Check your phone’s Settings under Gestures to see if the option is present.
