Originally Posted by Mr.Tim
When you update from v5 to v6 the instructions are different since you update via USB. Once you get to v6 then you can update over IP and don't need to disconnect stuff. If you can't otherwise solve the problem, I would update over USB with everything disconnected.
On the LED dimmers.. swapped them for non-dimming or for incandescent dimming type. It wasn't so much proximity of the LV cabling to the dimmer itself, but proximity to the cable supplying the dimmer.
The problem was very clear.. Turn one of those dimmers on/off and the issue immediately presented itself. I only had a problem with one circuit in a large house with dozens of these dimmers.
Interesting... we updated via IP so in that case we didn't have to disconnect stuff, right? This was the first time we were able to update via IP as we used USB previously so I think we were using v6 software.
This morning I tried different keypad combinations with all of the dimmers in the house turned off. I found that when music was playing in the master bath and kid's bath via their keypads, and playing in the kitchen (controlled by the kitchen keypad) I could not listen to music in the dining room, although the dining room keypad appeared to work fine, displaying changes in volume, sources, stations on the tuner, etc., but there was no sound coming from the dining room speakers. As soon as I turned off the kitchen keypad the sound came out of the dining room speakers and could be controlled by the dining room keypad. Then when I turned the kitchen keypad back on the sound came out of the kitchen speakers and no sound came out of the dining room speakers, even though the dining room keypad display was functional. This is similar to problems I had previously, but with different keypad combinations.
This problem was repeatable when I turned off all keypad locations and then turned them back on.
Then I powered down the MCA-C5 (including pulling the power cord) and powered back up. After I powered up this problem could not be repeated. The keypads worked fine in the configuration I described above. All of this was performed with no dimmers on in the house. I also tried using the remote app and did not see any difference in operation.
It looks to me like the keypads are working fine and that the problem is: (1) the C5 is not switching the power amps correctly for the keypad zones, or (2) the C5 is not switching the inputs correctly to the power amps for the keypad zones. I suspect the problem is in the controller for the switches and not in the switches themselves (I assume the switches are electronic, not mechanical). If the switch controller uses memory locations to maintain the status of the switches then maybe these memory locations are getting corrupted. The power on reset then puts the switches and memory locations in a known state so they operate properly... for a while.
PS If you have teenage daughters NEVER put whole house audio in their bathroom unless you want to see the hot water bill skyrocket!!!