Rotel RSX-1058 Won't Respond to Remote Commands

Have any forum members experienced a situation where your Rotel receiver suddenly stopped responding to remote commands?  I haven't made any changes to my system, set-up or remote (I use a Logitech Harmony One) but my receiver is unresponsive to any and all remote commands.  I haven't been able to find the OEM remote to perform a test but it seems more likely to be a problem with the receiver; it worked perfectly one minute than it just suddenly stopped responding.  Any info on similar experiences is appreciated.