Do a little detective work. Choose a new series that begins in less than 30 minutes (choose any show). When the show is supposed to record, go to your Recorded Shows list. Choose the show that is currently being recorded; even if it is only 1 minute into the show. You will know immediately if the recording has failed. Unplug the DVR for 30 seconds. Then try a new series. If that also fails, go to the Cox store and get a new DVR.