FYI PS Audio has had a problem with the Powerplants for years, they have acknowledged the bug that the only way to get them to work is to unplug them, talk about a pain in the @ss!
Even Paul said he was going to look at it and get it fixed and dead silence since then.
You are not alone with PS Audio gear that does not work as advertised or has problems, anyone buying PS should know this by now; all it takes is just a simple search or get in their forum.
Be honest and @oldhvymec is great advice.