First step is the upgrade, so put it on this firmware and see if resolved.
After that, if still an issue:
Hardware is the problem, likely, either the drum is bad, or the contacts in the machine to read it are bent/broken.
It can't hurt though I suppose, to shut down, unplug, remove drums, plug in and turn on, then insert each drum individually after it is online just to reestablish the connection
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for posts that resolve your issues. Your feedback counts!Joe Arseneau