We had a client with a Philips combo. Turned out that there were a few discrete codes that could anchor macros.
One was, select DVD before hitting POWER to turn the thing off. Then hit DVD-Play and it will turn on. Then select VCR to watch a tape.
The transport commands were different for the two devices, and would not operate when the other device was selected.
It took about 50% more time to figure out how to make this work than it would have with separate units. By then, they could have afforded separates. Tell your customer that these will save space and otherwise simply cost more in the long run.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
