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> What? You definitely don't need to remove any resistors onboard.

Yes, you do if you're using a voltage higher than 5V. Read the wiki page:

If you plan to use a buck converter at higher voltages, remove R135/R136 (75 Ohm) as they will dissipate a lot of heat and may burn out! See the picture on the right and below in the gallery for which resistors to remove. [0]

[0] http://linux-sunxi.org/Orange_Pi_Zero#Passive_PoE



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