Hi all. I am in need of a bit of help. I am able to hook up my small I believe it's a 13 or 15 inch flat screen TV to my Mac Mini via an HDMI kable. I am able to hear sound and sighted indeviduals are able to see the computer screen as well. But, when I try to use the volume keys on my Logitek K760 BT keyboard with the f11 and f12 keys my mom tells me that a (NO) symble comes up on the screen. It is like a circle with a slash through it. Is there any way anyone could help me to fix this. The tv is all the way across the room and I don't wanna have to keep getting up to change the volume, as I don't have a remote for the tv right now. I know I put a lot in to this and hope it makes since. Lol. Thanks a lot for all your help in advance. Take care all.