I recently got the audio processor missing error, which corrected after a reboot.
However then the PX locked up and would not respond to key press or panel knobs.
Support asked that I load firmware over sysex, but this didn't resolve it.
Now they suggest replacement of the CMOS battery, which I'm in the process of doing.
The old battery shows 2.9v where the new one has 3.2v (without load on either).
I'll let you know how it goes, if ok I might ask support if they would recommend people replace the battery as a preventative measure, especially if they are planning to gig.
It would seem such an insignificant thing, such a small detail that is of great importance in this case. After many tests, I noticed that with a new battery it works stably for some time without failures, but if it freezes or gets blocked once after, further it starts to freeze more and more often. And manipulating the keyboard and pressing F1 does not help either.
Considering all the comments on this topic, I would also like to add that with the last update the following began to happen to me: usually the device does not load into the menu if there was a freeze before! I connect the keyboard, I press F1, not from the first time, but in the end, I manage to launch Prophet. I see that there is access to the menu, Prophet seems to be loading as it should! Without even playing or using it, I just turn it off. And here I will forgive you to notice! Attention! Quite often, when you turn it on again, the download bar reaches the end and does not give access to the menu. This means that if earlier he behaved like this if there were freezes, now it is not necessary to freezes to occur, it can turn on normally once, and another time the typical inscription: cannot reach audio processor ...What is it? Battery? Software? as far as I was told by technical support that this is a software problem. If so, then why during testing, when, for example, some kind of failure occurs - in theory there should be an error code and use this code to find the reason and fix it, and so on until they bring it to normal and stable work! Logical?