I do not believe there is anything that would cause this in the newer firmware release and have not seen this on any of the devices I have upgraded.
Have you tried downgrading the device back to the previous version (or using the selectsw command) to see if that resolves the issue when the system returns to the pre-upgrade state to confirm if it was the software upgrade that caused the issue, or if the issue is somewhere else in the configuration of the room (ie volume turned down on the display or audio system - fauly amplifier - loose cable - etc)? My bet would be that it's an external issue and nothing to do with the firmware upgrade.
Please remember to rate responses and to mark your question as answered if approrpiate.
Wayne -- Please remember to rate responses and to mark your question as answered if appropriate.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.