My back key isnt working

"For the majority of people that own a Galaxy J5, the Touch Key is not broken and is actually working. The reason that these buttons are not working, is because there just disabled and turned OFF. Samsung has a default settings that has these keys turned OFF because the Galaxy J5 is in energy saving mode. Follow these step-by-step instructions on how to turn on the Touch Key lights on the Samsung Galaxy J5.

How to fix Touch Key light not working:

Turn on the Galaxy J5

Open the Menu page

Go to Settings

Select on “Quick Settings”

Select on “Power Saving”

Go to “Power Saving Mode”

Then go to “Restrict Performance”

Uncheck the box next to “Turn off touch key light”

if this does not fix the issue, the charging port must be changed due to these buttons are part of that assembly"

Very Helpful , Thank You .

Samsungj5touchbuttonicsnotworkingpleasehelpme