I have an hp pavilion g6 2008tx which has an hdmi port. I'm not sure if it supports input like connecting a ps3 with an hdmi cable. And if it does have input, I dont know where to change the display settings on my laptop. Would be great if someone could point me in the right direction.
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No it does not have an input, the HDMI is an output only.
To the best of may knowledge only some (maybe all) Alienware laptops have HDMI inputs.