A:AnswerLike most standalone monitors, it doesn't have the capability to connect speakers. However, if you have Bluetooth speakers, you can pair them to your PS4 and use them that way.
A:AnswerThe Chromebook would need the HDMI port to connect to this HP 24uh 24-inch LED Backlit Monitor which also has a HDMI port. You would need the HDMI cable.
A:AnswerHere is a link to the user guide for that monitor. Page 6 talks about how to disconnect the stand. http://h10032.www1.hp.com/ctg/Manual/c06236316