Ever since LG8 update my phone will shut down. I hit my power button and nothing. The first two times it happened I took out the battery to get it up and running again. I then found out if I hit the power button the menu and back button will light up but I have to hold the power button down for a long time or I have to hold the power, volume, and home button down for a bit to get it going instead of taking out the battery. Phone was fine up until update. I just did a clear cache partition and I am hoping that helps. If anyone has had this problem and fixed it or heard of a fix can you please share. Thanks
I'm sorry to hear you're experiencing issues after the update, please let me know if you continue to experience issues after clearing the cache partition.
I did finally figure it out. It was a software issue. I had an app called screen off and lock. After I uninstalled that the phone has been fine and it has been several weeks now.