I have connected my device to a power cord and it is charging very slowly or not at all. What can I do to fix it?

In order to fix this issue you will need to hard reset your device. (Make sure to back up all your files as they may be lost in this process) 1) Turn the power off. 2) Press and hold the Power key and Volume Down key on the back of the phone. 3) Release the Power key when the LG logo is displayed, then press and hold the Power key again. 4) Release all keys when the factory hard reset screen is displayed. 5) Press the Power key to continue or any of the Volume keys to cancel this process. 6) Press the Power key one more time to confirm the reset. For other issues related to charging the LG G4, please refer to this Troubleshooting Guide: LG G4 Troubleshooting

1) If you have a screen protector there might be a problem with it, so try taking it off. 2) If that does not work, try restarting the phone and see if your screen is responding. 3) If the problem persists, check that you have the latest update on your device, if not go Settings-> System->About Device-> Software Update and update the software. If the problem further persists please refer to the LG G4 troubleshooting page: LG G4 Troubleshooting