A:AnswerThis monitor works with gaming consoles and has an HDMI port and a VGA analog input, so unless you buy a switch, it only works with one HDMI device.
A:AnswerHave you looked at Parts.HP.com to look up the part number of your original monitor to see if it is a match to this model? We had many different 27" versions that looked similar but may have slight changes to the base.
A:AnswerYes, it does have audio (I got one from this site last week--the box says it has speakers, and the back has speaker holes in it, but it's wrapped up for Christmas so I haven't heard it yet!).