On successive days this week (yesterday and today), first one, and then the other of my two HR24's would not power on. They were unresponsive to power on commands from the remote as well as to the front panel power on button. In both cases, power-cycling the DVR restored them to operation, and both passed a system test. Both DVR's are less than six months old. Has anyone else experienced this issue? Edit: I just noticed that the HR24 that was unresponsive this morning failed to record a program that was scheduled for 8am this morning, which means that the DVR was completely not functioning.