I am at a loss with my GPSMAP 78s - I get Missing System Software message.... i believe its not a hardware issue but cannot find a copy of the firmware to force an update from the SD card.

Efforts working with Garmin have gotten me nowhere and for me to ship over seas is $$$$ i rather not spend on a unit that is a back up/loaner...

Anyone able to offer some help where to find formware i can force onto it as a last ditch effort? I saw a couple thread here but most of link are dead and i cant find what i need.

thx for any help.