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I want to use my slate 21 k100 as my pc’s monitor. I need to use it for studio purposes. So what’s the best approach? Update (12/22/2018) I want to know if there is any hardware modification possible to input an hmdi to the lcd

Thuthu  only if you can design a driver board for the LCD panel. for that you will need the engineering diagram for the panel itself and you will need to know how to design a circuit to drive that panel. Otherwise it will be very difficult to adapt you slate as a monitor for the PC.