Settop box (DVR) freezes even after multiple reboots
My settop box (DVR) goes through periods where it repeatedly freezes and needs to be rebooted. This happened multiple times about a month ago, and last night I had to reboot the box 5 times. When the box froze, none of the buttons on the remote worked. Twice, the box misbehaved, throwing up a 'press OK to watch TV', aka start screen, in the upper left corner while the TV kept playing just fine. One time the background for the spurious start screen was black, the other time it had a strange non-repeating bunch of white dots arranged in rows. Neither time could the rogue start screen be removed, so the box had to be rebooted these times, also.
FWIW, I also tried using the interactive TV function (Menu button on remote > Help > Troubleshoot) this morning, but it threw an error.
So... are there any other things to try before calling ATT, waiting on hold, getting another settop box, and losing all recordings?