B try change CPU chip U100, if did not help, board unrepairable
If source of problem is U300 or U400board is unrepairable.
2. If Board Leds turn on, board is unreachable through LAN or SFP+
ports and console shows no output
B If there no 1V8 output on L100 try change U102, if did not help, go to next bullet
B If there no 1V8 output on L100 try change L100, if did not help, go to next bullet
B try change RAM Flash U200, if did not help, go to next bullet
B try change NAND Flash U401, if did not help, go to next bullet
B try change U1300, if did not help, go to next bullet
B try change CPU chip U100, if did not help, board unrepairable
Routerboard does not boot 15
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