My ATC-02 had a problem. The red light was on but it would talk to the PC. The baffles would open and close using the buttons on the scope but nothing else. The Officina Stellare crew where great, and after awhile its repaired and operational. Temperature controlled mirrors, fans, baffle control all at the touch of a button again. First light was last night after only getting it back the day before (not sure what happened to the usual astronomy curse). Its a pleasure to use.