How can I convert an old laptop monitor to work like a (logitec-G15) display?

I have some old Laptops, one I would like to make the LCD work for a screen that reads my instant messages so as not to have to constantly minimize or affect while in game (yes I am a Gamer) I could run dual monitors but then that creates other issue. Thank-you in advance

Does the rest of the laptop work ? Otherwise its too much like hardwork - and expense. Steve