Raspberry 3B+ and DAC+ not booting (4 long and 5 short green flashes)


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?


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