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Celestron SLT mount/handset

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Afternoon all

I recently bought a celestron 127 slt, it was described as faulty "up and down not working"

The handset reports No response 16 & 17


I've just bought some fresh batteries incase it is as simple as that. Is there any other checks I could do to find out the problem



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Replaced the batteries which stopped the error messages but the motor was still not working 


So I pulled off the cover and took the motor off, to find it was working *yay*

This must mean it is jammed, so a quick unbolt of the arm reseat and do back up and it's now working fine 



Ngwillym. Thank you for the post. I was writing this one when you replied 

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Well fixed, swiss75.

My Nexstar showed a similar fault a couple of times, but in my case the 'not moving' was caused by one of the EPROMs in the  mount (not the handset, which reported the fault) becoming corrupt.  There is downloadable software available from Celestron that can test and reprogram the mount (as distinct from the handset).

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Cheers Geoffers 😀

Got it for 140 quid...slight bargain


One of the things i thought might be up was firmware but struggled to put the handset into data mode 🤨


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