Hello my laptop is Lenovo gaming laptop y700 its problem that when i plug the ac adapter the battery indicator keep flashing orange light and when i press the power button its have a white light for second and then nothing happened and the white light go away and
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Re: Lenovo Y700 Gaming laptop not working
Hello. What is the logic board # ? Is it NM-A541 ?
Review the usual DCin mosfets to check if they are being enabled.
Charger IC is the common TI / BQ series so check the voltage to ground of:
REGN ; pin 24
ACDET ; pin 6
ACDRV ; pin 4
ACOK ; pin 5
VCC ; pin 28
Post each measurement. Often, the 2nd DCin mosfet starts to leak and causes these faults. If ACDRV is not ~25 volts then the fault is in this area of the logic board.
ACDRV = adapter voltage + REGN voltage = ~19v + ~6v = ~25 volts to enable the 2 x DCin N-channel mosfets.
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