Who I have the same questioned this topic

My screen started flickering, going grey and then black starting about the time I got an update.  It's been a few weeks now.  I can tell  the phone is working, like receiving calls, but the screen wont function while it greys out like that.  I've done a factory reset, safe mode, debug, taking battery out...everything and it hasn't helped.  I'm going to try the suggestion of putting cardboard between battery and cover.  Hopefully that helps.  My contract is up in 20 days, so I haven't looked at repairs.  I've had the phone for nearly 2 years and this is the first time I've had any troubles.  It's been reliable and durable.  I just have to deal with it for 20 days then I'll get me a new one.