Symptoms: Non-repeatable dropouts of video and audio during playback every few minutes on all recordings. TV blinks grey for a split second and the audio drops out for a second or two. Audio does NOT drop out if fed directly from TiVo to Receiver, but it does drop out if feed through HDMI and TV. I tried rebooting and I saw the startup screens twice, meaning it rebooted itself during the first boot. Took the HD out (Seagate SV35 1GB) and ran SeaTools for Windows on it, passed all tests including the Long Generic. Booted up fine after that. Didn't have time to test it after that to see if the problem went away. Checked capacitors on TiVo's power supply, none were bulging.