Perhaps a long shot, but remove the card and see if there are any gold coloured contacts on the connector where it physically plugs in, if so give it a light clean with methylated spirits or better yep Isopropanol Alcohol (tape head cleaner) as they may be dirty/corroded etc.

Thanks guys, I’ll check the card tomoro and see if I can clean the contacts, no I have never updated it roofless....what’s involved here mate?

For mine I download the updates/patches onto a mini sd card on my laptop and then load it into my sounder.

It's an older hds though and I am out of date for sure on current models.

I worry that it's more than a patch you are dealing with.

My mates went bad and the price of repair would have been to much to risk the attempt.
He got the impression Lowrance didn't want to know anything more than a couple of years old.

Not trying to be a bummer but he ended up buying new.

Thanks heaps for all the advice guys, I didn’t get to it today but am going wide on Sunday so will have a crack at it tomoro, cheers guys