I have an old UR5 CB2 with the last update available. It sat in storage for about 6 months, and now the base joint won’t initialize. All it does is rotate back and forth when you press the Auto button.
I was told by a coworker that zeroing out the joint might fix it, but I’m not sure how to do that on a CB2.
Too lazy to pull up CB2 documents, but does that version let you hold down the RUN tab for a few seconds before the tech screen shows up? (Password “lightbot”)