Kasina Display Backlight Too Dim To Read

Hello, Im new here and just wanted to know why my Kasina display backlight gradually became so dim, that Im now totally unable to read any folders- as its now complete black?I would appreciate it if anyone knows why this has happened and maybe knows how to fix it.Thank you in advance for any help or suggestions.

Please try a factory reset.
Press and hold both the volume down (-) and brightness down (-) buttons while powering on the Kasina.