Hey! I just upgraded to LG G4 recently and I truly do love the phone, but the last couple of days I've been having an issue when I try waking the phone. It can take up to ten to fifteen times before it'll allow me to enter my password before it goes dark again. It's getting frustrating. It's new so I shouldn't have to reboot all the time, should I? If I hit emergency call it may stay up for longer and allow me to enter my password, but it may not.... Ugh.
If you are within 14 days, return to the store for an exchange. If past 14 days, call Verizon for a warranty return. I haven't had this issue at all not even once.