Thread: GPSMAP 78 isn't recognised after doing update!

@wojtech

There is this note in 62/78 software updates page :

IMPORTANT: if upgrading from a software version less than 3.40 you must follow these steps for future BaseCamp Compatibility:
If you are a user of BaseCamp now, or plan to be in the future, you must follow these steps to ensure your data is protected during this software update:
Connect your handheld unit to a computer and launch BaseCamp. Transfer all tracks, routes and waypoints to BaseCamp.
Delete the /Garmin/GPX folder from the handheld's mass storage.
Update the handheld's software via WebUpdater and reboot the handheld.
Reconnect the handheld to a computer and transfer your data from BaseCamp back to the handheld.

This is probably the reason you lost your data.
Probably is better you reverse it back to a previous frmware, use your backup then and repeat the whole updating procedure.
[Only registered and activated users can see links. ]
[Only registered and activated users can see links. ]
[Only registered and activated users can see links. ]

Originally Posted by wojtech

If I go through setup on the unit and go to the select map page the screen just goes blue, if I press Enter the unit turns itself off.

You made something wrong flashing it, I suggest to hard reset it and reload the software- Be sure your batteries are charged.
Remove any gupdate .gcd from your unit or sd, open your Garmindevice.xml and change in it your software version to a previous one, save it. Plug your 78 to your pc USB and use Webupdater to reflash it. Wait till your unit has completely loaded the firmware and restart itself. Hard reset it again.

Originally Posted by catymag

@wojtech
Probably is better you reverse it back to a previous frmware, use your backup then and repeat the whole updating procedure.

I think you missed the above while reading Catmag's reply. In your reply I don't see you mention restoring from backup first.