Beagle Pocket does not turn on.

We made the board with the open source of Pocket Beagle.

We made a total of five.
Only one of them works, and four do not.
I don’t know the cause.
All pin maps have the same voltage.
The voltage of EMU0 (CDN of SD card connector) is 3.3V for normal board and 0V for abnormal board.

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How to solve it?
What do we need to check?

Best regards
CH Cho