Re: HP Envy 15 cannot charge battery!
USB is controlled by South Bridge not EC. If you remove PR155 you can se if that cycling stopping. Then it is probaly EC chip failed.
Firt measure PU1 PIN23 should be 0V when chargin is OFF and PL6 0V. PIN23 control upper mosfet PQ15 and PIN 20 lower PQ13 make 12V from VIN 19.
Originally posted by grahamw01
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Firt measure PU1 PIN23 should be 0V when chargin is OFF and PL6 0V. PIN23 control upper mosfet PQ15 and PIN 20 lower PQ13 make 12V from VIN 19.
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