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