• there is a button usually on the bottom row it is usually blue or light grey and says FN on it. there will be a key in the top row that either hast CRT/LCD or a picture of a screen on it(square within a square) it will be the same color as the writing on the FN key but should alos be one of th F* keys usually F5 or F8, look at them all and find out plug in your screen and hold the FN key and hit the LCD/CRT button and it will switch to the other screen

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