In my experience, when my expander crapped out it corrupted my TiVo internal disk image as well. I wasn't able to get to the point of "divorcing", because even with the expander unplugged the TiVo wouldn't reboot. I have since retired the expander and replaced the internal disk in the TiVo. The box has been working fine since (about 2 weeks). Given that the Premiere is still flaky, you should consider buying an internal replacement disk for your TiVo or DIY if you have another TiVo to copy the image from. If no other image, you can also buy InstantCake and DIY from there. But you then have to Clear & Delete Everything, which means a truck roll by Comcast to re-pair the CableCARD(s).