Celestron NexStar Evolution － Not slewing at all when using the right/left keys

[doubledoubleswifty]

Hello,

I bought a Celestron NexStar Evolution second hand a few years ago now.

It was working perfectly fine the last time I used it a few months ago.

I got it out this weekend but when using the right/left keys on the NexStar/Starsense controller or the Skyfari 6 Plus App on Android - it won't slew at all.  There's not even any motor sounds.  

However, using the up/down keys is perfectly fine.

Please could you suggest what I should do?  😪

[Cosmic Geoff]

Partially dismantle it and re-seat all the internal connectors.  If that does not work, obtain a multi-test meter and check whether power is reaching the horizontal motor. 

Note that in some alt-az GoTo mounts, the horizontal and vertical motor/gearbox assemblies are identical.  If this is the case with your mount, swap the cables over and see what happens - it may disclose where the fault lies.

[doubledoubleswifty]

Thanks Geoff for your reply.

Unfortunately, I don't think I'm clever enough follow your recommendations without making the situation worse.

I think I'll also contact Celestron to see what they say.  

Do you know of any people or companies in the UK that might be able to repair it?