B try change R34, if did not help, go to next bullet.
B try change U6, if did not help, board unrepairable.
If 1V2 Failed
Problem area on top layer:
B try change Q10 and Q11, if did not help, go to next bullet.
B try change C21, C32, if did not help, go to next bullet.
12 Routerboard does not power on
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