hang-the-9 :
What exact cable are you using? You did not really say much about the setup, is the laptop HDMI out and projector is VGA or other way around? How is everything hooked up?
I have a cable with VGA at one end, linked to projector and HDMI at the other end, linked to my Lenovo laptop which has no VGA slot. I have a speaker plugged in to the laoptop via a jack. When I use this on its own, I get pictures from the projector but no sound. I need sound as there are interviews on my PPT presentation. I'm hoping that the Switch will enable both pictures and sound. Thanks for your help.