820-02016 no power

[Jeffotskie26]

no visible water corossion, no short on bigcoils.
unable to dfu mode configurator unable to detect.
meter shows only 5.18v with 1,37amp
PPBUS_AON looping from 11.6V-12.23V

 

[2informaticos]

PPBUS_AON looping in such way without battery?
3V8_AON stable?
Also check PMUs master/slave LDOs.

 

[Jeffotskie26]

yes its looping without battery board is disconnected to the case.
PP3V8_AON_VDDMAIN: 3.8v stable
there is no full shorts on master/slave coils.

 

[Jeffotskie26]

SOLVED! found full short on C7800 PP5V_BSTLQ_SPMU also replaced L7800

 

[2informaticos]

Thanks for feedback.
Someone else may find it useful.