I want to use the audio out on my big screen. I bought it new in 1996 and it has worked like a charm every day. Now we have "Guitar Hero" and I want to hook up earphones. How do you turn the "TV Monitor" volume up. I use the original remote to turn off the "TV Speaker" and set the "TV Monitor" to "Variable" but I can't get the volume up. It is very faint and doesn't respond with the volume control. (The manual is packed away somewhere) Can someone help? Thanks.