Sorry but I have to ask, why would one press CH+ and CH- at the same time? What was trying to be accomplished by doing such?
Mark Sony XBR5 / Pioneer Elite VSX-94THX / Panasonic DMP-BD30 / Toshiba HD-35A / Pioneer Elite DV-48AV / SqueezeBox 3 / SA 8300HD / all with a Pronto TSU7000