hp omen 15-dh1015nl does not turn on

[mon2]

Trying to relate to your board layout and agree that PUB01 is your charger IC. Not confident the 3 devices are the mosfets of interest.

Is there a mark on the middle device? Is this a defect on the top surface? If yes, this part may be defective and needs to be replaced. What are the topside markings of each of these parts?

[giulio93]

Trying to relate to your board layout and agree that PUB01 is your charger IC. Not confident the 3 devices are the mosfets of interest.

Is there a mark on the middle device? Is this a defect on the top surface? If yes, this part may be defective and needs to be replaced. What are the topside markings of each of these parts?

Sorry mon2 I ddidn't understand your reply.
We were talking about the voltage of the ACOK that seams to be low, we are still looking in that direction? I'm confused
Here the pics of the 4 mosfet you ask me for. Top marking ON NCP 303150 ALAR2001

[mon2]

The 4 mosfets are not the mosfets of interest to us at this time. These parts are the multiphase power supply mosfets that take turns to power the cpu so that not one mosfet is burdened by the heavy demand. The cpu is a large current draining device and a single mosfet would heat up too quickly.

Share again the full topside markings of PUB01. Often this part is the charger IC. From this detail we can find a datasheet and locate the ACOK pin then trace that signal further. On the ACOK pin will be a pull up resistor. We need to hunt for where this resistor travels to locate the power rail that may be defective.

[giulio93]

The 4 mosfets are not the mosfets of interest to us at this time. These parts are the multiphase power supply mosfets that take turns to power the cpu so that not one mosfet is burdened by the heavy demand. The cpu is a large current draining device and a single mosfet would heat up too quickly.

Share again the full topside markings of PUB01. Often this part is the charger IC. From this detail we can find a datasheet and locate the ACOK pin then trace that signal further. On the ACOK pin will be a pull up resistor. We need to hunt for where this resistor travels to locate the power rail that may be defective.

The PUB01 is the Intersil 88739A W00f4K. The datasheet seams not findable, and the ACOK pin shuold be the PIN2 (beased on what you and mcplslg123 share with me)

[mon2]

Yes, he referenced the Acer LA-H501P schematics to learn about your charger ic in another thread. Search for this schematic on this forum and we can use it to guide us on how your logic board is most likely wired up for pub01. Some parts are protected by the semiconductor factory on demand from the customer.

[giulio93]

Yes, he referenced the Acer LA-H501P schematics to learn about your charger ic in another thread. Search for this schematic on this forum and we can use it to guide us on how your logic board is most likely wired up for pub01. Some parts are protected by the semiconductor factory on demand from the customer.

I find the schematics and boardview. Now can you teach me what should i looking for?
I don't understand "Some parts are protected by the semiconductor factory on demand from the customer". I are referring to the datasheet of the intersil IC chip?
Thanks

[mon2]

Yes, it is stupid mentality of the semiconductor and the logic board companies to hide datasheets like this one from the public. Anything can be hacked and reverse engineered with enough time. What is to be gained to hide the datasheet for this part? It is only a battery charger IC. Throw it in the garbage if it is not available? Obviously everyone and their mother can access all sacred documents. They always leak out overseas. For a price, anything can be purchased.

The charger IC from the posted schematic is very likely to be similar to your board here:




Review the location of pin #1 which will be dot on the IC. Then count counter clockwise to locate the next pin = pin # 2. Nearby this pin should be 2 small tiny black parts (resistors) camped on this pin.

One will be a pull-up and another a pull-down like the above schematic. Confirm their location. Post close up clear pics of PUB01 on your board. This should allow us to hunt for these parts. This is the ACOK pin.

[mon2]

Your pics in post #16 offer details of pin #1. Top left side is pin #1.

Go down by 1 pin for pin #2. To the left of this ic are 2 black resistors. With no power, measure their resistance across their body. Post the measurements.

[giulio93]

Your pics in post #16 offer details of pin #1. Top left side is pin #1.

Go down by 1 pin for pin #2. To the left of this ic are 2 black resistors. With no power, measure their resistance across their body. Post the measurements.

I already take some measure in post #37 if they are usefull, anyway accros the resistor of PIN2 (the bottom one) I have 100KOhm and accros the top one 86KOhm.
Thanks

[mon2]

Carefully, measure the voltage to ground on each of these resistors. Post their measurements.

[giulio93]

Carefully, measure the voltage to ground on each of these resistors. Post their measurements.

with AC adapter plugged in and NO battery?

[giulio93]

Carefully, measure the voltage to ground on each of these resistors. Post their measurements.

With no battery plugged in I have on the bottom resistance 2.8V on the right and 0 on the left. For the top one resistor 2.8V on the right and 5.2 on the left

[giulio93]

Carefully, measure the voltage to ground on each of these resistors. Post their measurements.

Are the measurments correct? The divider is working fine?

[mon2]

The 2v8 looks to be in the proper range for a logic '1' = true state that the adapter is OK. The pull up voltage of 5v2 is important.

What is the voltage to ground of pin #1 (Vin)? Assuming it is the adapter voltage since ACOK is '1'.

If you meter probes are fine enough, continue to monitor each of the pins on this charger IC with a steady hand. Post the full list of the voltages and their pin #1 (with function) for a review.

For example, suspecting that the SMBUS lines SCL / SDA should be ~3v3 each.

[giulio93]

The 2v8 looks to be in the proper range for a logic '1' = true state that the adapter is OK. The pull up voltage of 5v2 is important.

What is the voltage to ground of pin #1 (Vin)? Assuming it is the adapter voltage since ACOK is '1'.

If you meter probes are fine enough, continue to monitor each of the pins on this charger IC with a steady hand. Post the full list of the voltages and their pin #1 (with function) for a review.

For example, suspecting that the SMBUS lines SCL / SDA should be ~3v3 each.

I already do that in post #14 (the PIN2 was taken wrong and correct in the followed posts)

[mon2]

Post an updated list of measurements.

Pin #1 = 2v6?
Pin #30 = ?

[giulio93]

Post an updated list of measurements.

Pin #1 = 2v6?
Pin #30 = ?

I confirm PIN1 2.666V
PIN30 is too risky to measure, it is an fondamental PIN for our investigation?

[mon2]

Pin 1 is ACIN
Pin 2 is ACOK ; voltage on this pin is 0v?

[giulio93]

Pin 1 is ACIN
Pin 2 is ACOK ; voltage on this pin is 0v?

PIN2 is 2.8V

[giulio93]

Pin 1 is ACIN
Pin 2 is ACOK ; voltage on this pin is 0v?

What do we check now?