I have a problem, system with Raspberry 3B+ and DAC+ Standard is not booting.
It stucks on the rainbow and doesn't go further.
The green light flashes 4 long and 5 short.
Without connected DAC+ everything works, Rasbian installs and launches (hifiberryOS without board just shows black screen after the rainbow).
At the second when I connect board – it stops booting. And in a half minute green light starts blinking.
Tried 4 different power sources, every time without board everything works, with – not.
Tried with last HifiberryOS and with Raspbian – in both same behaviour.
Do you have any ideas how to solve it?