Omen 15-dc la-h482 no power on

[aldopc]

Hello friends, I have this hp 15-dh la-h482p motherboard, the charger cut off at first, I replaced the PQ-B01 input mosfet, now the charger delivers the voltage but it still does nothing, could someone please guide me what measurement or tests to do...

[aldopc]

Re: Omen 15-dc la-h482 no power on

Hello friends, I have this hp 15-dh la-h482p motherboard, the charger cut off at first, I replaced the PQ-B01 input mosfet, now the charger delivers the voltage but it still does nothing, could someone please guide me what measurement or tests to do...

Helpme please

[mcplslg123]

Re: Omen 15-dc la-h482 no power on

PQB01/PQB03-Voltage on Pin1-4-8??

Attach or link the schematic?? Which charger IC is used here?

[mon2]

Re: Omen 15-dc la-h482 no power on

Adding to the above requested list of voltages...

Pin #1 of the charger IC ? (voltage to ground; ACIN)

Often the 2nd mosfet (PQB03) gets killed and causes the gate voltage to be lower. The proper voltage for the GATE pins of the 2 x DCin mosfets should be ~25 volts.

As per above request, with the adapter connected, what is the voltage to ground for pin #4 of the 2 x DCin mosfets ?

Someone posted the schematic today, here:

https://www.badcaps.net/forum/showth...light=LA-H492p

[aldopc]

Re: Omen 15-dc la-h482 no power on

Hello friends, thanks for your help, today I wanted to do the measurements and again PQB01 burned, I couldn't measure what can I do in this case? change it again? and see if I can measure?

[mon2]

Re: Omen 15-dc la-h482 no power on

Yes, get a replacement but do not install it.

Measure the resistance across the mosfet pins of the 2nd mosfet.

Source & drain
Source & gate
Gate & drain

Post each measurement. No power during these tests.

[aldopc]

Re: Omen 15-dc la-h482 no power on

Yes, get a replacement but do not install it.

Measure the resistance across the mosfet pins of the 2nd mosfet.

Source & drain
Source & gate
Gate & drain

Post each measurement. No power during these tests.

Ok, friend, I appreciate your time and your wisdom, I have attached images of the measurements.

[mon2]

Re: Omen 15-dc la-h482 no power on

These are good mosfet readings.

With the first mosfet installed, what are voltages on each DCin mosfet?

The gate voltage (ACDRV) should be ~25v to enable.

[Metti82]

Hello friends, I have this hp 15-dh la-h482p motherboard, the charger cut off at first, I replaced the PQ-B01 input mosfet, now the charger delivers the voltage but it still does nothing, could someone please guide me what measurement or tests to do...

Hi aldopc,

Did you find a solution?


Best regards

Metti