Forgot my password and got locked out, but I'm back. So, my thoughts are exactly Chris'. Something gear related. My Loona is in pieces at this exact moment and I just received her new hip motor in the mail. I will be replacing when I get home. GNFB, I'll try to remember to do a quick video showing the hip components. In the case of my bot, the gearbox on her right hip motor seized. Opening Loona is easy with the right tools, but you have to be patient. It may be best to invest in a spludge kit (I hope I spelled that right) for prying the panels off. Her "legs" have two panels to pop off, then a third that has a few screws. The third panel is easier to pop off once unscrewed due to the openings from the previous panels. There are different screw sizes throughout, so put some tape on your workspace, sticky side up, so you can lay the screws out and not get them mixed up. It's a lengthy process, but if you go slow, there's not too many components to worry about. I'll be off work in a few hours and will start the moment I get home.