Why is my LG phone not functioning like it is supposed to

[Jhaysee]

My LG phone keeps rebooting I've restarted it times without number but it isn't working. I can't even put a password on it because it is always writing force stop pls what do I do

 

[ManiacJoe]

Sounds like you may have been hit by the G4 boot-loop problem, or the phone is slowly progressing in that direction.
If that is the case, you can get the motherboard replaced (for free?) or buy a newer phone.

Does the phone actually get to the security screen after it starts?

 

[Mooncatt]

The G4 had a design flaw that caused this. One way to verify it is to put it in the freezer for about 10-15 minutes, then turn it on while you leave it in. If It fully boots and acts normal, then yours is the known bootloop issue. Basically it's a bad solder joint that loses connection when it heats up.

You could try getting the motherboard replaced, but the problem is likely to pop up again with the new one. I personally just upgraded when my G4 was bit by this. I'm on the LG V20 and couldn't be happier.