Hello. I have Garmin Dezl 560 , but do not have mount / cradle with pin for charging. When i connect car charger with microUSB port in microusb port on device , screen brightness is dim (around 50%) . In setting show 100% . I test control brighness to 10,20,30,40,50% and work , after 50% there is no change in light. When i disconnect charger and device work on battery brightness control work on works in the full range and lights up 100% .
Tomorrow i record video and show .