Thank you for this info. I think I might have solved this with your help. When I checked the drive on Windows, it came up as 38% fragmented. The drive has been used for ages and I’ve deleted lots over time. I have TV channel icons stored on the drive, so that would explain the lockups. I’ve defragged the drive and this morning I don’t lock up when I scroll thro channels
My theory is that the badly fragmented drive was causing problems akin to the disconnection you describe. I’ll be using the box later today and will post to confirm whether or not it’s fixed.