If you are sure the wall outlet has power and the cable is properly connected to the device there's not much we can do. The manual doesn't mention an internal fuse. Sounds like the device has failed.
RS40 User Manual (c-wss.com)
John Hoffman
Conway, NH
1D X Mark III, M200, Many lenses, Pixma PRO-100, Pixma TR8620a, Lr Classic
