The touchpad of my Inspiron N4050 stops working properly everytime i plug my external HD that is AC powered or the HDMI cable. It doesn't matter if the AC of the laptop is connected or not, the touchpad becomes impossible to use. I tried using it in other places thinking of an energy problem at my place, but it still occurs. Other laptops work normaly with the external harddrive and the HDMI. Does anyone have a solution for this?
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