820-2936 Only runs off charged battery but wont detect the charger

Im new at this, 2936 works fine off charged batt but wont detect the charger, no green light no nothing. I have already tried different DC ports
 

2informaticos

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Remove battery and post 3V42_G3H and PPBUS_G3H exact voltage.

Also post exact value for R7080/81 and R7085/86 measured onboard, ohm scale.
 
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