I have an ATV that I use exclusively for streaming music (and music videos) to a dedicated stereo system. I purchased it used almost two years ago and it has had an issue rebooting after a few hours since I purchased it. Recently it reboots much quicker after turning it on and multiple times. I have a 40 GB model connected to a LAN. I also have another ATV in my HT that has no issues streaming the same content and it never reboots. Both are connected to the same switch so I'm pretty sure the issue is in the ATV and not elsewhere. When I turn it on it works properly and I have no issues streaming any content. Then, regardless if I'm streaming content or it's sitting static, it will freeze up. After several minutes it reboots. During this process the light blinks and I can hear the hdd. After the reboot the select language screen comes up. After selecting English the recovery screen comes up with Restart, Run Diagnostics, or Factory Restore options. I've tried all three and I'm running the latest Apple software. No outside software or external hdd is connected. I'm using the HDMI out to an Apple Cinema display and use the optical out to a DAC. I've also tried using music files stored on the hdd and the same thing happens. Any idea if this is the hdd acting up or something wrong with a board inside?