I took delivery of my PMG DAC 512 on Friday afternoon. I had similar problems with the display and could get no output at all from my PMG Transport input to either of the I2 inputs. PS Audio’s Taylor suggested doing a Factory Reset. That solved all the issues and glorious music immediately poured from my speakers. I have been struck by the improved spatial localization of instruments and vocals, tighter bass and smoother highs. It’s been running about 28 hours now and continues to improve. I’m impressed. It replaces the MKII and clearly is a big improvement of my already good system. So try a factory reset.