We have been having issues with our older 78″ 300 series boards since the windows 20H2 where the board is recognized but pens wont work except for right after login and for about 10 seconds. Support has asked me to upgrade the firmware with the file they linked https://support.prometheanworld.com/article/1038/
Everytime I attempt it fails. I have attempted connecting directly to the board with no success with the amp turned off. I am wondering if I am missing an older firmware that I need to incrementally upgrade from? Currently the board is on firmware 8.04 Build 0. They are wanting me to go to version 8.10 Build 7. Is there a link to the older firmwares?