Badcaps Forums - View Single Post - Axis Q6034-E Speed Dome cam No Power (teach me about POE)

**momaka** · 01-06-2022, 10:44 PM

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.

01-06-2022, 10:44 PM	#2
momaka master hoarder Join Date: May 2008 City & State: VA (NoVA) My Country: U.S.A. Line Voltage: 120 VAC, 60 Hz I'm a: Hobbyist Tech Posts: 10,862	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.