I've had pretty good luck programming everything else in my system, but the Technics is not working well. I can turn power on/off and control volume, but I can't program any input selections into the unused keys. Different random number keys will switch the inputs to VCR, CD, TV/DSS and Tuner, but I can't make DVD work. Head-to head learning only produces a single red light and no function assigned to the 1994 key. Am I doing something wrong or are there issues that I'm not aware of? I'd appreciate any help at all on this. Also, how will I know when I've used all the memory up?

Thanks in advance,
Ted