As I understand the question I think I've had that problem before and solved it quickly. I suspect the same 30 second hack will fix yours as well, although there may be some complications that we need to understand.
What fixed mine was not without controversy. It can result in a total loss of function if not careful. The crew was understanding and responsive with 5 pages of concise comments.
must have been india customer service translation of english code of instructions to close the panel, vice remove panel while in flight, which resulted in group coding error followed by subsequent loss of signal and anomalous failure down range