I have an Asus 1215n and apparently I screwed something - when I plug in a cable to my laptop's HDMI there is video on the TV, but the sound comes from the computer. I've noticed that in audio options I no longer have HDMI Audio Out - I only have Realtek Audio (my laptop's, that is). What can I do?
Actually usually the problem is caused by your TV, because here you can choose if there should be audio by the HDMI cable or separately. Sometimes all you have to do is to reset everything. Turn on the TV (without the HDMI cable), turn on the laptop (after a full reboot, preferably) and then connect the two with the cable. It has to work.