Ok here is the problem.
Last night a friend brought his Astro 320 US edition to downgrade the firmware to 3.40 so that he can use Radio Function here in Europe.
When I downgraded firmware screen rotates 180 degrees and moves a bit to the left leaving blank space on the left side of screen (colors are also different like blue is red now). Also when booting it doesn't show Astro 320 but Astro?, in Webupdater it also shows device model as Astro?. I have already downgraded more than 50 Astro 320 devices and never seen anything like this before, so if anyone know something about this please tell me what can I do, except returning this device to GARMIN?
I have a astro 320 armed with the same problems Ask each ace to help me to solve grateful！
Problem has been resolved
I don't know why problem repeat again
After downgrading my US Astro 320 with Garmicure3 and updater exe to version 3.40 I got display upside down and shiffted 8mm left.
I have tried installing 133901000430.rgn but the same reapiered after installation is over?
What am I doing wrong?
And are this 2015 Astro 320 v4.40 downgradebale to 3.40 at all?
It works now.
That patched version 4.30 133901000430.rgn seems to work fine. I have just tested it on the field and it works fine.
Just to resume that i failed to downgrade with Webupdated but seccede with GarminCure3 and updated.exe!
Webupdated steps was HUGE waste of time in my case.
Garmincure3 solved and issue in 30 mins.
Very best regards
Ivan From Croatian Dinaric alps