An additional note (and bump!) My wife suggested that, since this is a software issue, that I try using the printer's on-board Black or Color copy buttons, thus leaving the computer out of the loop. However, this prints blank as well.
Please help. I have a reasonable level of knowledge, so advanced repair instructions will not be lost on me.
Reinstalled again, this time making sure all HP peripheral programming was first removed, including director and other crap I don't need.
Tried different USB port.
Read HP.com's useless troubleshooting guide.