HP Omen 16 no display

[fhulgzz]

Hi I need help, I hope someone can help me.

Model: Omen 16 B0080TX
Board Code: DA0G3KMBCG0 REV:G

I have a hard time diagnosing because there is no schematics/boardview available yet, if you have, please share.

ISSUE

• My personal laptop I used for my repairs. While in sleep mode it wont turn back on so I long press power button to turn "off" then press again to turn "on" and there the screen is black, no display
• Charger is working
• It has power, keyboard lights is on but CAPS LOCK light is not, looks like its freezing.

ACTION TAKEN

• replace good ram
• connected to external monitor HDMI
• remove everything connected to motherboard and tried, still no display.
• flash bios with clean ME and other working dump bios still no success.

This is the picture of the motherboard
Question 1: Please help me locate the RTC circuit, can't find it cause there is no schematics.


This are the voltage measurements when power is on. Looks normal to me.


This coil near the SPI chip and wifi slot has unusual heat / overheating maybe, but there is no short on the caps around. I was thinking maybe this circuit is faulty.


This is the IC near the coil that has unusual temperature or has overheating. The IC itself is overheating.
Question 2: Please help me identify this IC, so that I can try and replace it maybe this one is faulty.
Question 3: Is it safe to remove this IC and power it on? I'm asking because last time I remove some IC (on different motherboard) the component near it got burnt.

[mon2]

Re: HP Omen 16 no display

Part is from Alpha Omega Semiconductor.

See attached.

[fhulgzz]

Re: HP Omen 16 no display

Part is from Alpha Omega Semiconductor.

See attached.

thanks Sir, could this be a good replacement? I'm not sure yet because there is no schematics of the board but looking at the physical pins, they look the same. I will check the pin configuration manually if they are the same.

[natic]

Re: HP Omen 16 no display

Question 1: Please help me locate the RTC circuit

Hello!
The RTC quartz oscillator (32.768kHz) is most likely the one marked in the following picture.

Question 3: Is it safe to remove this IC and power it on?

Yes, it's safe to run the machine without this chip.

- Measure the resistances to ground on all coils.

[Sephir0th]

Re: HP Omen 16 no display

Exactly, resistance measurements please. A warm 1.8V supply isn't a good sign but normally has nothing to do with the buck converter, but with the load.

Actually I don't understand the point to let the board run without 1.8V supply. There will be nothing to achieve. The board can not perform P.O.S.T. this way. Same with the RTC circuit. There is likely no issue if the board reaches S3 or even S0 state.
Measurement of the CPU and the GPU are missing completely instead and need to be added for a whole overview about then situation.

[fhulgzz]

Re: HP Omen 16 no display

Hi, here is the resistances to ground on all coils.

[fhulgzz]

Re: HP Omen 16 no display

Exactly, resistance measurements please. A warm 1.8V supply isn't a good sign but normally has nothing to do with the buck converter, but with the load.

Actually I don't understand the point to let the board run without 1.8V supply. There will be nothing to achieve. The board can not perform P.O.S.T. this way. Same with the RTC circuit. There is likely no issue if the board reaches S3 or even S0 state.
Measurement of the CPU and the GPU are missing completely instead and need to be added for a whole overview about then situation.

Hi, I already measure the resistance to ground posted above this comment.

Im sorry maybe we have different understanding or terms on what is a "load" means. Maybe load has different meaning in my language . Can you point me to the right direction where is the load your are referring to or what pin in this buck converter?

I ask if it is safe to run the board without this IC because it is only my wild imagination to further test the voltages around this circuit, its hard without schematics to follow.

Hope you have time to help me with this.

[mon2]

Re: HP Omen 16 no display

The load will be the cluster or group of parts that are being powered by the power rail that follows after the inductor or LDO regulator output.

A LDO regulator for example, effectively burns off the higher voltage from the input side to offer.a lower output voltage. This process will cause the LDO to generate heat.

An inductor will imply the rail is a switch type design and will pulse on/off to create the lower output voltage but will be more efficient than the LDO and will generate less heat.

Either way, if the load is excessive, expect more heat.

[fhulgzz]

Re: HP Omen 16 no display

The load will be the cluster or group of parts that are being powered by the power rail that follows after the inductor or LDO regulator output.

A LDO regulator for example, effectively burns off the higher voltage from the input side to offer.a lower output voltage. This process will cause the LDO to generate heat.

An inductor will imply the rail is a switch type design and will pulse on/off to create the lower output voltage but will be more efficient than the LDO and will generate less heat.

Either way, if the load is excessive, expect more heat.

Great, thanks Sir for the explanation.

So I will focus on the load maybe there is problem there.
If this is a 1.8v pch power ic, is it possible the pch is faulty?
Or anything somewhere after the inductor?

I will check this and post update.

[sikocan]

Re: HP Omen 16 no display

The load will be the cluster or group of parts that are being powered by the power rail that follows after the inductor or LDO regulator output.

A LDO regulator for example, effectively burns off the higher voltage from the input side to offer.a lower output voltage. This process will cause the LDO to generate heat.

An inductor will imply the rail is a switch type design and will pulse on/off to create the lower output voltage but will be more efficient than the LDO and will generate less heat.

Either way, if the load is excessive, expect more heat.

Great explanation!

Regarding the OHM measurements you've taken, please take them once more. Set your multimeter to the 200 range. Any reading above 200 ohms should display as OL. For anything below that, share the readings rounded to two decimal places. For instance, the GPU might show as 0.23. Also, measure the resistance of your cable by connecting to two ground points on the board and share that reading too.

[fhulgzz]

Re: HP Omen 16 no display

Great explanation!

Regarding the OHM measurements you've taken, please take them once more. Set your multimeter to the 200 range. Any reading above 200 ohms should display as OL. For anything below that, share the readings rounded to two decimal places. For instance, the GPU might show as 0.23. Also, measure the resistance of your cable by connecting to two ground points on the board and share that reading too.

Hi here is the measurement at 200 ohms range on multimeter.
Ground to ground resistance is 2.2 ohms.

[fhulgzz]

Re: HP Omen 16 no display

Up for this.

[fhulgzz]

Re: HP Omen 16 no display

The load will be the cluster or group of parts that are being powered by the power rail that follows after the inductor or LDO regulator output.

A LDO regulator for example, effectively burns off the higher voltage from the input side to offer.a lower output voltage. This process will cause the LDO to generate heat.

An inductor will imply the rail is a switch type design and will pulse on/off to create the lower output voltage but will be more efficient than the LDO and will generate less heat.

Either way, if the load is excessive, expect more heat.

Sir do you have any further ideas? Im stock here without schematics. I badly need help. Thanks in advance.

[Sephir0th]

Re: HP Omen 16 no display

This looks all fine to me. Since even the RAM supply is up and running it's the time to take a look to the coils above the CPU and GPU. We need to know the present voltages there.

[fhulgzz]

Re: HP Omen 16 no display

This looks all fine to me. Since even the RAM supply is up and running it's the time to take a look to the coils above the CPU and GPU. We need to know the present voltages there.

Hi, here is the voltage measurement of the coils near the CPU and GPU. Kindly check. Thank you

[mcplslg123]

Re: HP Omen 16 no display

The voltage readings look good. Btw, DRAMRST# present on pin108 of ram slot?

[fhulgzz]

Re: HP Omen 16 no display

The voltage readings look good. Btw, DRAMRST# present on pin108 of ram slot?

Yes, pin108 on ram slot has 1.2v

[Solennia]

Re: HP Omen 16 no display

Hey, did you manage to solve the issue? I am having a similar problem with my machine. Its an hp omen 16 as well with blackout display and bios chip overheating problem.

[fhulgzz]

Re: HP Omen 16 no display

Hey, did you manage to solve the issue? I am having a similar problem with my machine. Its an hp omen 16 as well with blackout display and bios chip overheating problem.

Not yet. Still waiting for some inputs by the other members here. Its hard diagnosing without schematics. I dont want to guess and cause more damage to the motherboard. Hope someone can give thier expertise.

[mcplslg123]

Consumption on dc supply
01 With Ram
02 Without ram