I'm having the same issue on my D1 Pro 10W as others on this community forum.  It's almost a year old and I'm on my 3rd mother board (1 original/2 replacements)!  It works fine for a few months with a new board then progressively gets worse, stops in the middle of a project, then bounces back to creative space with a disconnect message.  Product support has been very nice but the answer is always a new mother board.  I'll be out of warranty in about a month.  Its ruined a few expensive projects and now I don't trust the machine.  There has to be some type of design flaw/mechanical issue with so many people having the same problem.  I'd like a credit for my machine and would upgrade to the next device up but, was just send a mother board and was told I could sell my machine on the 2ndary market then buy the next model.  Doesn't seem right since I can't keep this machine working without ruining pieces.  Wouldn't be fair to sell it to someone else knowing there's an issue.  I'm pretty unhappy at this point.