YES! Try it on the signal conductor first. If you have it backwards the signal will not pass. Configure it so signal will pass from the RP1 to the block.

Not with this scenario but with a number of parallel IR circuits in the past.

I must have missed the concept with David's suggestion... if the macros reside on the RP1 how can the be triggered via the keypad? ...or is that not the issue?

Tech support indicates I'll have interference with both IR outputs tied together. Waiting for another reply plus some time to return to client's home to "test".

"Hey, man, it worked for nearly a year, it can't be all bad!!"

Put diodes in them

I ment to say put diodes where two or more IR outputs merge

Try a dumb-sounding thing. Hook your telephone test set -- butt set -- across the IR signal line. It should be silent if no commands are being issued.

I once found a noisy IC in a dinky linnk this way. Don't ask why it occurred to me to put a butt set on it. But once I heard it I knew why IR wasn't working correctly. There's nothing that says a problem can't develop after a year. And it could be an RP1 problem that doesn't show when the RP1 is issuing commands, only when it is silent. Or supposed to be.

I like the butt set idea. I will try that for grins.

I did sub the RP1 by the way.

I'm sure the solution will allow me to use the same configuration again, 'cause that type of setup could be repeated.

I say diode isolate the two RTI devices.

If you don't understand diodes use a 2-zone connecting block because it has the diodes already installed.

[Link: en.wikipedia.org]

Everything Diode... once you learn anode and cathode you should be good to go.

Diodes.

We did home electronics repair for 20 odd years. Every once in awhile a repair would go awry and an amp would really smoke. Great smells.

One of the tech's wives came in the shop after such an event. Her insight was priceless: "It smells like diode chili in here!"

Tom,
the electricians were around to make some changes in the three-phase 220 panel at the factory/store I worked at.

I walked into the bigscreen, video source and A/V receiver room and smelled burning Japanese Power Transformer. A distinct smell.

As I walked out toward the power panel, I met an electrician who was coming up to see if everything was all right -- he had removed the breaker for that room while still connected to its output wire, and had let it sit on the 220 buss for a couple of minutes before he noticed it.

It's really interesting that when Japanese power transformers overheat, they smell so different from American ones.