Thank you James and Michael. I was hoping it was repairable because it's $314. I get the "No Response 16" and "No Response 17" errors. The weird thing is Celestron tech support people never thought of the problem being the main board. In fact, after they replaced my new StarSense which, of course, didn't work either, they still wanted me to try hooking my StarSense hand contoller to the StarSense camera, then a cable from the camera to the hand controller port. They never mentioned the main board. I just googled and found it. My telescope is an A-P EDT 130. The image sharpness and detail are indescribable. Now I fear I'm stuck with a less than adequate mount for astrophotography purposes. I'll bite the bullet and replace it and hope it doesn't happen again. Thanks again.
Michael Milligan joined the community