gonk - thanks. I tried erasing the macro that I had inadvertantly put into the power button using the instructions in the manual. It did'nt work, but I tried a variation where I pressed the mute and sat buttons simultaneously, then I hit the channel up buttion and the remote is working again. I've found that if aud/mute are used to program a macro then it can only be activated when the top source buttions (aud,cd,dvd,aux) are active. Conversely if sat/mute is used then the macro can be accessed only when one of the bottom sources is active. The book did'nt say anything about this.