Your browser does not seem to support JavaScript. As a result, your viewing experience will be diminished, and you have been placed in read-only mode.
Please download a browser that supports JavaScript, or enable it if it's disabled (i.e. NoScript).
S
So HP engineering said that this should work but they had not tested it. Make sure you are fully up to date on the firmware and the P410 should be able to go to the P400 safely. But.... caveat emptor, of course.