Solved. After eliminating one item after another, and initially only looking at the NIC, I went ahead and removed the DMS card. Wouldn’t you know it, no longer the rEFInd error and they went on to image. Thanks for everyone’s suggestions. This goes to show that some errors are not really related to what they appear to. 40 + machines saved from surplus.
Best posts made by Birgit Godfrey
RE: HP EliteDesk 705 G1stops on rEFInd