I suggest installing a previous version. Reinstalling the new, and turn off and back on. Perhaps it did not load completely properly.
Happens once every few days. Reading just stops. Most times after going through the disc removal procedure, I’ve found that wiping down the disc with my eyeglass cloth and trying it again will usually work. Very finicky, though.
That a few discs don’t play but everything else does? Is there anything in common between these discs? Are they CD-Rs? Do they have very long playtimes? Are they hybrid SACDs or dual discs?
I was told by someone at PS Audio that my unit is an “older” one and likely needs the disc drive (as well as the output board) replaced. At the time, about 2 - 3 years ago, the cost was $250 I think. Or, they could give me a credit/trade in on a new model.
I never did get the unit fixed as I’ve ripped all my CDs and play them from the aif files; FWIW, the PWT does sound better than the same files streamed through a player.
Like yours, my PWT wouldn’t even play new copies of the problematic disks.