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Old 01-06-2022, 10:44 PM   #2
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Default Re: Axis Q6034-E Speed Dome cam No Power (teach me about POE)

Check resistance to ground on all of the buck/boost circuits. I see 3 inductors that are possibly used for power conversion (not counting the Coilcraft ones or the POE+ETH one.) If any of these inductors show a very low resistance to ground, chances are the main IC(s) may have been hit by a lightning or other similar surge. Also check the associated MOSFETs and diodes on those power rails for short-circuit. If the POE injector is indeed shutting down and indicating a power overload, then very likely that is what's happening - something, somewhere, is shorted on a DC power rail.
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