I've had my nook tab 4 for 6 years now and it has worked fine. Every once in a while it wouldn't load videos of any kind, so I would do a hard restart. But yesterday when I did it it would not go past the nook title on the start up. I've cleared the cache, hard restarted it, let the battery die, but nothing works. I would really appreciate it if someone could help guide me to fixing it.