Hello, I bought a new LED Samsung monitor for my PC and discovered that auto adjustment is locked and couldn't manage to adjust picture lighting because the browser doesn't stop at any option except contrast. My Samsung monitor model is BX2331 - model code is LS 23x3HKF/ZN
On: If you press and hold the MENU button down for 5 seconds, the OSD Adjustment Lock
function is activated.
Off: If you press and hold the MENU button down for 5 seconds again, the OSD Adjustment
Lock function is disabled.