Solution for On Screen Display (OSD) Problem
There is the simple solution if Online Screen Display (OSD) like Caps
Lock, Num Lock, Fn Key Indicator is not working on Acer Notebook. If you are
having these Problems, it may be “Launch
Manager Application” on your
notebook is not installed or not working properly. To solve these problems, you
need to Plug in your AC Adapter and follow steps provided below.