I decided a few days ago to try to use my N810 as my alarm clock in the morning. I plug it in to the charger at night, check to make sure the alarm is set. I watched a video just before bedtime so I know the sound worked. When the alarm went off the next morning, there was no sound. I was almost late for work. I checked the volume settings everywhere and they were all turned up. I had no sound at all, not even screen taps or music. Finally had to reboot the device, and sound came back. Same thing happend next day. Sound just quits during the night. I know it's possible that I could have installed something new and screwed it up myself, but this is only my first week with the tablet and I'm just anxious to try the different apps. Just wanted to see if anyone else has seen this problem and fixed it. Thanks for any help I can get! This is a really cool device!