I have 2 x 3510 HDPVR's. They were purchased brand-new in March 2013. One of the units is not performing as it should, in my opinion. Every few minutes, the front display brightens and I can hear the hard drive begin to spin. This constantly happens. As of now, I can hear the hard drive spinning and the head reading and/or writing data.. In both cases, the unit is not recording and is powered offplugged into an power outlet.
Has anyone else experienced this?