Hi. I'm looking for some advice. The NexStar+ hand controller on my Advanced VX mount just died. The light comes on for a second on the screen but then fades away. I am using an AC adapter to power the mount. The adapter is working. The small red light on the AVX stays on as usual. The problem seems confined to the HC. I am awaiting a reply from Celestron. There was no hints leading in to this that there was anything wrong. Do you think that it is repairable or do you think a replacement is called for? also, am I correct in thinking that the problem is confined to the HC? An AVX mount without a HC is a large piece of expensive metal. Thank you.