Λοιπον συνεχιζω την Οδυσσεια της ASGT..μολις ηρθε email απο την Celestron...σκεφτηκα να το δημοσιευσω σε περιπτωση που χρειαστει καποιος φιλος στο μελλον... No respone message Thank you for your email. The no response message of 17 is a general one pertaining to communication with the Declination motor. Typically we would suggest checking your declination cable and making certain that it makes good contact. But, this sounds more like something to do with the power supply. It is important to make sure you are using a power source with 12 VDC regulated and a minimum of 2.5 amps current. Insufficient power and incorrect power are a major cause of issues with the workings of this mount. So, check the cables and check your power source. Thank you, Derik Celestron Technical Services Celestron.com