External HDMI is not working, screen brightness is not working, graphics driver is not loaded

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I've been learning a lot from this community and have been trying out some posts on topics concerning my problems as listed above. I have some problems in adding an external monitor via hdmi port of my laptop, it is simply not picked up, the HDMI hardware is recognized but no graphics card driver is recognized. Also my screen is always full brightness, also when i disconnect the power cable, the…

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