LCD doesn't have that brightness and contrast button, and the computer panel doesn't have that brightness bar
Can the monitor be without an adjustment button? Impossible. Can't you find it? It's usually in the menu.
Some are usually in the left side of the monitor, or the left, the middle, right, right, the lower side of the button you look at
General graphics drive installed, there is a set, you use the win7 system, the lower right corner of the taskbar, the speaker next to the inverted triangle point to see if there is no graphics card settings, such as there can be changed
