Good thought, I moved to another room but still no luck. Here is some more info, maybe a Hex Guru can decipher this. I have a Marantz 3200 remote that does switch my matrix box, here is how a code looks in the Marants for one of the inputs of the switch:

0000 006E 0024 0002 0152 00AB 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0040 0015 0015 0015 0015 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0015 0015 0040 0015 0040 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 05DB 0152 0055 0015 0E30 0152 0055 0015 0E30

I then copy pasted this into my 7500 and it worked it looks like this (it did not change):

0000 006E 0024 0002 0152 00AB 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0040 0015 0015 0015 0015 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0015 0015 0040 0015 0040 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 0040 0015 05DB 0152 0055 0015 0E30 0152 0055 0015 0E30

It did not change the code. When I learn this same input on my 7500, it looks like this and does not work:

900A 006D 0000 0001 20DF 00FF

This was the only input I was able to get to work, I copy/pasted the other codes from the RC3200 but they did not work in my 7500 even though they work in the 3200.

Thanks, Bill