exz8 wrote:From windows, I can enter control panel -> Backlight Control -> Advanced Backlight Options
I think your device has been modifed, so after start it will jump to windows...
As I know it should start to original main menu....I think the original setting (before you modified, it is in auto adjustment position, there is tap on/off). If you cannot reach this setting then it will stay in position Auto Adjustment, trying to change from control-panel backlight control wont work since auto-adjustment still unchanged.
If you want to try, you can use CETotalCommander/explorer and go to windows folder and find "Startgps.ink" (other papago device has this name), if press this, it will start to Original Main Menu.
But pls consider it as at your own risk, since maybe you will get unexpected result.