• Finally, it appears non-working. 

    Overall, I've bought 2 boards and both are flawed. doesn't answer.

    Is it possible to return it anyway? have anyone tried?

  • At least try it.  You'll know if the gyro is working immediately.

    It probably failed hi-pot or final test and went back for rework/reflow.  That's not uncommon in lines that actually have a QA department.

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