Have an Onkyo TX-DS898 A/V receiver (doesn't have HDMI) connected to DVR7232 via component cable + optical cable. A Verizon-recommended Western Digital e-Sata drive is connected to the DVR. Each component worked together without difficulty for several months.
Due to unrelated DVR failure, have replaced the DVR twice in last few weeks. Have performed the "enable more storage" routine many times, formatting the expansion drive each time. The expansion drive is recognized and shows as 100% available.
Once the A/V receiver is turned off, the DVR shows the time for about 5 seconds, then reboots. I have tried powering off the TV, DVR and A/V receiver in different sequences with the same result. I've done this so many times that every so often, the reboot doesn't occur for several on-off cycles, then it starts rebooting again. If I disconnect the e-Sata drive the reboot problem goes away completely.
Thanks for your reply. It pointed me in a new direction to solve the mystery.
My problems had begun following a power failure. When the power was restored, there was no FiOs picture or sound. Roku and Blueray worked with picture and sound. No connections had been made differently. Verizon customer service was unable to resolve even after sending two replacement DVRs.
I control my setup with a Harmony remote, so I re-downloaded the command software to the remote. By trial and error, determined that the A/V receiver had lost some internal settings, which I restored. Now everything worked, except for DVR reboot issue. I now noticed that the A/V receiver fully powers off instead of going to Standby the way it used to. The external hard drive was plugged in to the receiver. I switched the drive to another outlet and the problem was fixed. Somehow, the Harmony remote reload altered the A/V power down command.
Again, thanks to both of you who took the time to reply to me. PROBLEM SOLVED!