I have two boxes -- an 8300HD DVR and a 2100. Both boxes will reboot on their own. There seems to be no reason for the reboots. The 8300 does it a lot more than the 2100 but we watch that TV a lot more. The 8300 did a reboot 4 times in the last two days. That is more than normal. The TW solution is to swap out the boxes. We have done that many times. The problem continues. The tech guys come and go and can find nothing wrong. The last guy told me I had a bad ground outside and he fixed it, the time before I had the 8300 in a bad plug in my house and if I changed it it would fix it. The time before that it was because I had a splitter to my VCR and that was the problem (I removed the splitter for a few months no changes) This has been going on for about 2 years. Anyone have any ideas? I can't have a dish or TW would be long gone so that is not an option.