Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
That does sound as if your Celestron telescope's hand controller has a bootup problem. The bootup software and/or operating software of the device has evidently become corrupted.
But first, before proceeding, make sure to turn everything Off, check all connections between devices, and see whether the error repeats itself when the equipment is turned On again.
After that... options depend upon several factors. Where you are located (roughly) and how old the equipment is, are the two most important things.
Also, whether you have a computer (PC or Apple) could matter.
Let me know, and I will advise you further.