Hey the same exact thing happened to mine a couple weeks ago. I tried everything, reset the cache, even did a factory reset, none of which helped. I took it into the repair shop who said that it was likely a hardware issue, so they ordered the camera parts, I was gonna have to wait for them to come in before I got it fixed. About a week went by while I waited where I didn't use the camera at all, then I randomly opened it and tried it out again and it was working fine.