MDM Trouble Report for 2024 Jan 10 Telescope: 2.4m Observer(s): M. Sitaram, D. Schiminovich (Columbia University) Instrument: CHaS Problem(s) Encountered: It seems like a limit switch of the Y direction of the guide probe failed (since it is the same thing that happened at our observing run last April). When we tried to move the guide probe to a star, it gave the error 'Communication problems with X and/or Y, check log and the Y position of the guide probe on the MIS window turned red. In the log, it said Sensor Fault, both limits asserted. For the last 1-2 hours that we observed after this, we managed to find a guide star by moving X only. ------------------------------ Submitted on 2024 Jan 11 [6:00:12]