Prolite monitor brightness and contrast locked

Can't adjust the brightness or contrast

ProLite monitors have an sRGB mode which can cause the brightness and contrast controls to be locked.
Press ENTER and go to the COLOR menu. Check to see if this is set to sRGB, and turn it off!

Alternatively there is an "i-Style Color" setting which can also lock the brightness and contrast.
Simply press EXIT to see this menu and set it to OFF.