The remote control I received with my Motorola DC6416 cable box, a
UR5-MDVR has a programmable feature to work with other brands of
connected equipment. I was able to get my Samsung TV 3 digit code but my
HTIB, a Panasonic SC-HT740 is proving to be a problem.

I tried the codes in the documentation that was provided with the
remote control but that did not work.

I checked out the website to see if there were updated instructions
but I have the most recent codes.

The remote even has an Auto Search Method - but that too was
unsuccessful.

Any ideas?

Thanks.

Give the technics codes a try.

Thanks, tried it but turns out that Technics codes and Panasonic codes are the same.