Proximity card reader intermittently flashing amber. Will not register card swipe.
Product: HP Color LaserJet FlowMFP M681
Operating System: Microsoft Windows 10 (32-bit)
In our organization, we have 12 HP printers configured with proximity card readers to facilitate secure pull printing. Recently, two HP Color LaserJet FlowMFP M681 printers had their firmware updated to version 18.104.22.168. This update may not have been the cause of the change in behaviour, but recently both of these printers started having their proximity card readers fail. I've yet to find a pattern, but almost daily each will have its card reader stop registering swipes for Secure Pull printing (the secure pull components remain installed on the printer).
I want to try to rollback the firmware version, but don't see a download from the printers' software page at support.HP.com. Can someone suggest where I might find older firmware versions for this model printer?
Of course, if someone can suggest another fix for the proximity card reader problem, I welcome any.