I have my Sony tv since 2016 and have noticed that sometimes it would take a long time for the TV to turn on but eventually after waiting a while or after unplugging the tv, it would go back on. But now, the tv simply won’t start. I have tried a few things (I have revisited an old post of someone with the same problem) but nothing works. A day ago, everything was ok... any suggestions?? I’m not sure how to perform a factory reset, if indeed that is what’s necessary.