On bios show the SN of the battery....
HP Omen 15-ax014ns - Don't charge or discharge battery!!
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Battery SN is a good sign that the SCL / SDA lines are working as they should. The BMS inside the battery module is spitting out the requested information by the EC. Good.
Remove all power. Review the resistance across PQ1001. Being a N-channel mosfet (AON6414), the gate pin must be higher than the voltages being passed between source / drain pins on the same mosfet to ENABLE. Anything lower will leave this mosfet as OFF.
Meter in resistance mode, check the resistance across the mosfet pins:
source & drain
source & gate
gate & drain
Post each measurement.Comment
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Hi again! It's OL in all cases...
source & drain = OL
source & gate = OL
gate & drain = OL
The problem i see is the voltage on the gate and source of PQ1001, are 5,85V. If i desolder the mosfet, the volatges are the same on these 4 pins of the board, 5,85V. And no short on PC1005... And i replace these mosfet but nothing different....Comment
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Thanks again for your support...This is the question, why the gate of AON6414 didnt be activated... I post the voltages of BQ738H, i hope it helps to resolve this question:
Without battery, only AC:
PIN 1: 19'9V
PIN 2: 19,9V
PIN 3: 19,9V
PIN 4: 25'8V
PIN 5: 3V
PIN 6: 2,8V
PIN 7: 0V
PIN 8; 3,3V
PIN 9: 3,3V
PIN 10: 1V
PIN 11: 5,8V
PIN 12: 5,8V
PIN 13: 5,8V
PIN 14: 0V
PIN 15: 0V
PIN 16: 6V
PIN 17: 5,8V
PIN 18: 5'7V
PIN 19: 5'8V
PIN 20: 19'9V
With battery, and AC:
PIN 1: 19'9V
PIN 2: 19,9V
PIN 3: 19,9V
PIN 4: 25'8V
PIN 5: 3V
PIN 6: 2,8V
PIN 7: 0V
PIN 8; 3,2V
PIN 9: 3,2V
PIN 10: 1V
PIN 11: 11,5V
PIN 12: 11.5V
PIN 13: 11.5V
PIN 14: 0V
PIN 15: 0V
PIN 16: 6V
PIN 17: 11.5V
PIN 18: 11.4V
PIN 19: 11.5V
PIN 20: 19'9V
Only battery:
PIN 1: 11,5V
PIN 2: 11,5V
PIN 3: 11,5V
PIN 4: 11,5V
PIN 5: 0V
PIN 6: 1.5V
PIN 7: 0V
PIN 8; 3,2V
PIN 9: 3,2V
PIN 10: 1V
PIN 11: 17,6V
PIN 12: 11.5V
PIN 13: 11.5V
PIN 14: 0V
PIN 15: 0V
PIN 16: 6V
PIN 17: 11.5V
PIN 18: 11.4V
PIN 19: 11.5V
PIN 20: 11VComment
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Check PR1002. Measure the voltage to ground on each side of this resistor with only the battery. It should be the same voltage as charger pin # 11.
At ~18 volts, this N-channel mosfet should be enabled.
With no power, check the resistance of this resistor.Comment
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Review the low side battery charge mosfet @ PQ1007. Pin # 15 on the charger IC (gate voltage for the low side mosfet) remains at 0 volts for each of the cases? This is not correct when the charger is expected to charge the battery since it will be toggling on/off to create the charge voltage from the high Vin from the power adapter.
Confirm pin #15 is not shorted and that it is reaching the gate of the low side mosfet.Comment
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