It is likely that it is the B&G Hydra 2000 Processor. You should consider it at end-of-life at 18 years old.

You are in a beautiful spot. There is a place in England (https://www.aandtinstruments.com/) that might be able to repair the processor, but while it is removed, you will have nothing including no depth. Also, was the wind working on the digital display before this happened? When was the last time the wind was working? There are technicians on Grenada and Trinidad, but if it is the processor, they probably will not be able to help. There is a good B&G tech and shop in Nanny Cay Yard, Tortola, BVI.

Bill