I'd recommend trying an actual terminator. 120 ohm 1/4 watt resistor across pins 2 & 3. As adding an additional fixture will still leave the chain un-terminated.
Again, I'd start with terminating all data chains coming from the splitter. I actually just had a splitter fail, causing 2 lines to act sporadically, affecting only a certain range of addresse, no matter what universe it was on. Which is where a tester would come in. Did the error stay at the same address or with the same unit? If you plug each chain into the console directly does it still act up? Also, occasionally on my compact, I've had no dmx output, like a process or service module didn't boot correctly. A simple restart and all was well. So is this a continuous problem or only happened once?
Controllersupporr.martin.com At the bottom of the page is "File Archive". You can browse for the documents to describe the updating process. I'll try to post the links, but another good resource. It's also the online help manual.
ALSO, DO NOT DO ON DAY OF SHOW. GIVE YOURSELF TIME TO UPDATE AND TEST. JUST LIKE A SOFTWARE UPDATE.
Firmware install procedures.
A list of specific ones needed on the compact. This is for ver 3.40 and higher. Still always a good idea to check them all. As described in the installation procedures.
If the links don't work, let me know. I'm sorry, doing this from my phone.
- I understand. If you are able I'd recommend getting one at some point. A great tool to have in the inventory. I had to get one to chase down my dmx issues as mentioned earlier. In the meantime, another way is to start tracing the line unit by unit starting at the console and adding one cable and unit at a time. Just to make sure it's not any cables or combination of cables and equipment. It sounds like you may have tried this by switching addresses and chains. And last, it could be a bad dmx decoder board on a unit starting to fail.