I just had a pretty similar problem recently. When I arrived the car would answer calls but had no door operation... When I tried operating the doors from the HD85 open and close buttons I had nothing. Plugged my tool into the HD85 board and didn't even turn the tool on, and tried the open and close buttons and they started working?? Ordered a new HD85 board but haven't had a chance to change yet but car has been running for a week. Apparently the building was doing some generator work that morning and the building power was being affected. I'm pretty sure it's going to end up being the HD85 board going out but not 100%.