I would say if the screen turned black the moment you connected the 9V, then a good chance something occurred internally to the laptop. When you press the power button are you seeing any life in the system at all? Hearing any beeps or flashing lights? You could open the system up and have a look at the motherboard for any burned components.
JOcean
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December 5th, 2019 09:00
I would say if the screen turned black the moment you connected the 9V, then a good chance something occurred internally to the laptop. When you press the power button are you seeing any life in the system at all? Hearing any beeps or flashing lights? You could open the system up and have a look at the motherboard for any burned components.