I have a DCT6416 PVR and an extender. Over recent days it has been increasingly difficult to watch previously recorded programs....tonight after watching an episode, I requested it to be deleted but the message froze on the screen....PVR does not currently respond to the remote, nor does the power button on the box switch off when pushed, and the clock stopped when the screen froze. This is approx. the 4th time it has happened in the last 2 days even though I have disconnected the PVR and extended from the power source each time.....works for a while when re-connected and then repeats as described above. Any solutions?