While I do work for some engineering firm that designs similar things to the http://www.panasonic.com/business/psna/products-surveillance-monitoring/management-control-systems/matrix-switchers/WJ-SX650.aspx that doesn't mean I can help directly.
Such issues are taken up with the maker's support system. That's how I've seen it work with the company's I've worked with for decades.
Bob
Hi, can anyone help. Board 1 upgraded firmware but not board 2. Need to revert as no comms to board now available

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic