I see a remote control so explore all the menus there.
I can't see the keyboard but right or wrong the makers are dismissing documentation so look carefully at the function and arrow keys for any symbols about the screen.
-> As to CONTRAST. I don't see that adjustment in the PC any more. It's gone.
Does anyone know how to alter the screen brightness and contrast on this machine? I have tried looking at online manuals but they contain no help. Thanks.