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POSSIBLE PROBLEMS
PROBLEM #1
“No Response” Errors
The hand control displays No Response errors when plugged
into the mount, and the mount is powered on.
• If the hand control displays No Response 16 OR No
Response 17 (only one of these errors and not both), the
problem is with the mount, not the hand control. Contact
Celestron Technical Support at
for assistance.
• If the hand control displays BOTH No Response 16 and No
Response 17, the problem could be with either the mount or
the hand control.
• If your mount has an AUX port(s), try plugging the
hand control into the AUX port instead of the HC
(hand control) port. If the No Response error goes
away, there is a problem with your mount’s HC
port. You can still use the mount by plugging the
hand control into one of the AUX ports.
• There could be a problem with your power source
providing too low voltage or current. Try using a
different power source to see if the problem goes
away.
• Updating the hand control firmware with Celestron
Firmware Manager may resolve the problem. We’ll
explain how in the next section.
• If using the Celestron Focus Motor, and the hand control
displays No Response 18, then there is an issue with the
focus motor not responding or not being detected by the
hand control. If this occurs, try using CFM to update the
hand control firmware to see if this resolves the issue. We’ll
explain how to do this in the next section.
• If updating the hand control firmware does not
resolve the No Response 18 error, then there may
be a problem with the focus motor’s cable or the
focus motor itself. In this case, please contact
for further assistance.
Celestron Hand Control
TROU B LESHOOTI NG G U I DE
This troubleshooting guide can help you resolve problems related to the Celestron Hand Control. Specifically, if you
have a “No Response” error, “BOOT LOADER” error, or the hand control reports the improper telescope model, follow the
instructions below to see if you can fix the problem on your own.
