Dead Garmin GPSMAP 420

[Kemp]

It seems software update just bricked Garmin GPSMAP 420. Used software and install instructions from this site Garmin: Legacy GPSMAP with SD Card Updates & Downloads

So now unit shuts down after Garmin logo appearance. Any ideas how to perform a forced software update? No instructions for this unit here Garmin | United States | Marine Support

In test mode unit does not pass RAM test.

 

[Sandy]

Contact Garmin Support in Southampton. They are extremely knowledgeable and quite friendly.

 

[Ksansan]

hello! who can tell you how to turn it on test mode?

 

[Ksansan]

if someone has old firmware, please share it.