I Was watching a tv program. Went away for couple minutes & the pvr just stopped. It showed 0000 and every 30 seconds your can hear it trying to start up and also flashes all icons on front but the stops. I tried unplugging cables etc. nothing works. Not even the power button on the device itself? I ended up switching with another one in the house and that works fine! i can't even reset as it won't allow me to do anything. any advice?