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At least you have control of the scope with the hand controller even if some of the input functions are not working.
You are at a point where if you cant input that information is going to cause you issues or if they are a minor inconvenience. Since you have partial control, you could make things worse. A new hand controller last time I got one was around $230.
It also depends whether you are willing to risk doing another upgrade/downgrade again in the hope to gain the full functionality of the handcontroller.
I would say contact Skywatcher as Martin has suggested if you do decide to proceed with the upgrade. I am not sure what occured during the first upgrade and what went wrong as well.
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