I am not familiar with the 818, but my older Onkyo 5007 had this weird sort of trigger arrangement. The only way to get it work the way you want it to work was like this (you do need a programmable remote though, like my Harmony):
Zone 2 trigger to activate a power amp
What I did was:
1. Teach the Harmony one the command to turn on and off Zone 2.
a. In the Harmony control program, go to the devices tab, select the receiver and click the "learn IR" button.
b. Go down to the list and in the "Learn New Command" box enter the name you want for Zone2ON and click the "learn" button.
c. Follow the program instructions and on the original receiver remote, press the Zone button once (it turns red) and then press the ON button. The Harmony should have now acknowledged the key press and learned the command.
d. Back in the learn page, enter the name for Zone2OFF and click "learn".
e. Without pressing anything else, press the STANDBY button on the original remote. Another command learned.
2. Now teach the Harmony remote that the receiver needs further commands to turn on and off:
a. Go back to the devices screen in the Harmony control program and click on the "Settings" button for the receiver.
b. Select "adjust power settings" from the list and click next.
c. Go to the "Which command will Power On your device?" and select "My device needs more than one command to turn it on and off."
d. Select Zone2ON as the second command needed.
e. Do the same for "Which command will Power Off your device?" now selecting Zone2OFF as second power off command.
3. Update your remote. Connect the trigger to your power amp, make necessary adjustments. And you're all set!
On the Onkyo remote, you first have to hit the Zone2/3 button on the top of the remote to get into Zone2/3 mode - if the Zone button turns Red, then you're in Zone 2 mode. Hit the Zone button again and it turns Green, meaning you're in Zone 3. Keep in mind that the Zone button remembers what Zone it's been set to before (so pressing it once may turn it Green, for instance).
Now, once you set the particular zone using the above instructions, you can press ON, and if you're in Zone 2 (Red), Zone 2 will turn on. Same idea to turn Zone 2 Off- press STANDBY while Zone 2 is Red. That particular Zone's 12V trigger fires too.
I memorized these IR commands with my Harmony 1100. The key to all this is that the Zone button does not send an IR command, it only sets the following button presses to operate in that Zone. So to memorize (for instance) "Zone2On" IR command in the Harmony, you must first press the Zone button until it lights Red, then press ON. The Harmony will memorize that ON as being for Zone 2. Do the same thing for "Zone2Off" and Zone3 if you want.
Thanks for the reply.
This issue isn't with setting up remote to work properly, it's that the 12v trigger on the NR818 won't trigger the LPA-1 to turn on in general.. I can push the sequence on the remote (or receiver front) with the cable plugged in and Z2 will turn on with no corresponding amp turning on. While the Z2 is still on, I can unplug that cable and a volt meter will show 12.4-12.6v being put out. I spliced the same mono cable and if I plug that in to the amp, a 9v battery will trigger the amp on...