I have a Note 8.0 N5110 that has a strange problem which I don't really how to troubleshoot. When I am using it, the screen will go off just as if I short pressed the power button. I'll press the power button and swipe the screen to unlock. Everything is just as it was when the screen went off, but now the menu, power, and back buttons are non-functional. There are no lights or haptic feedback when I press them. My device was previously rooted before the 4.4.2 update and I had to use odin to install the upgrade. The issue didn't start for a couple of weeks after the update. Once the screen blanks and the buttons become non-functional, minutes later they will start working again; however, at some point, the screen will blank again and the cycle repeats. I have restored to factory settings with no luck resolving the issue. In fact, the screen will blank while I'm still in the setup phase. I really don't know what to try next to resolve this problem and my device is pretty much unusable at this point. Any thoughts or suggestions as to what I could try to fix this? Thanks in advance for any help - Jeff Gaiche