HP Omen 15-ek0049, DA0G3EMBCD0 Rev:D (Quanta G3EA / G3E?)

[LarrySabo]

= TPS51486

Yes, I know, thanks. TPS65295 is a replacement and easier to find. Does anyone have details on the missing component and traces in the destroyed area of this circuit?

[Maxim Skridonenko]

Boardview ... open

[LarrySabo]

HP Omen DA0G3EMBCD0 G3EA Boardview doesn't seem to correspond with the layout of this board, even though it has the same part number. The area was badly burned but I thought there was a small component connected to the ground stub just above the capacitor. Perhaps that's just a test point and there really was no crispy component that came off when I cleaned up the area.

I just received some TPS65295 ICs so I'll install one with nothing attached to the stub and see if it works. I need to mask off the exposed ground plane in that area before replacing the missing tracks (red). I'll update the post to show what I find. Thanks again for your helpfulness.

[LarrySabo]

Unfortunately, I have 1.4 ohms to ground on the HWPG line at the ENE, so no point in installing the new IC. That's after cutting the PGood trace to the IC to ensure there is no short in that area. I think I'm at a dead end.

[LarrySabo]

This parts motherboard shows a component in the area I was trying to repair. anyone know what it is and where it connects?

Never mind. It's a 0.1uF/25v ceramic cap.

[TheChief79]

It that a common fault in this laptops? Have exactly the same burned chip/area. Does i have effect on the ITE8750E and 3.3V rail? 3.3V rail was shorted, the ITE getting hot, when in injected voltage. 3.3V Up again after removing the ITE. But still have to fix the burned 1.2V area.

[LarrySabo]

It that a common fault in this laptops? Have exactly the same burned chip/area. Does i have effect on the ITE8750E and 3.3V rail? 3.3V rail was shorted, the ITE getting hot, when in injected voltage. 3.3V Up again after removing the ITE. But still have to fix the burned 1.2V area.

Hello TheChief79,

I don't know if it's a common fault -- this was only the first or second Omen I have worked on. It sounds like your ENE has a short. Fixing that burnt area is a nightmare, BTW, if it has burned off the top layer of the MB like in my case, exposing the ground layer just beneath the surface.

[TheChief79]

Hello TheChief79,

I don't know if it's a common fault -- this was only the first or second Omen I have worked on. It sounds like your ENE has a short. Fixing that burnt area is a nightmare, BTW, if it has burned off the top layer of the MB like in my case, exposing the ground layer just beneath the surface.

Hi Larry,

yeah, mine too. Used some UV mask and still waiting for the replacement chips (ITE and TPS). But i wonder, what caused that burning.

What are the values for the big too caps? The right one is completely missing, the left on was blown.



And is there another component? Resistor or something? Or another small cap?



Maybe 3x 10uF and and 1x0.1uF caps accouring to the datasheet?

[LarrySabo]

Maybe 3x 10uF and and 1x0.1uF caps accouring to the datasheet?

Yes, I believe so.

[Dam112]

Hi, do you know the designation of the circuit in the photo? It is located above the keyboard connector. Motheboard: DA0G3EMBCD0

[TheChief79]

Does somebody know, which IC this is?

[aaronmacdonald]

Does somebody know, which IC this is?

that chip is 51393P. closest datasheet is https://www.alldatasheet.com/datashe...TPS51396A.html

did yours burn out? i am suffering the same burnout as other posters in this thread (TPS51486, and most specifically the small capacitor just below it); and indeed under a thermal camera this 51393P chip does in fact get warm, but in my experience when these chips show warmth it is because of a short somewhere else and rarely in these chips themselves.

[TheChief79]

Ya, i killed it accidentally by my self, shorting with probes. Thank you!

[TheChief79]

Hm, cant be an 51393p. The chip on the board has only 16 pins, 51393 has 20 pins. Do u have a detailed picture of that area?

[TheChief79]

The rest of the chip. Could it be sy8386arhc (rN marking)

[aaronmacdonald]

sorry, was looking at it's southern neighbour marked 51393, the chip in question is marked rNCLA

I find myself at the same spot as Larry, with about 1.4 ohms on HWPG. I'm going to have to run off of instinct/suspicions on this one, and start doing some limited voltage injection to the VRM and looking for *any* displays of heat to the mosfet-drivers under a thermal camera (it could be small and momentarily, if my hunches are correct - and after verifying no voltage leakage to the core, of course) **hunch is formed from prior experience with RTX 20 card repairs.

[Yehuda170]

The rest of the chip. Could it be sy8386arhc (rN marking)

.

[ryogadan78]

Good morning guys. I have my Omen laptop (DA0G3EMBCD0) that now gives no signs of life (no LED).
During the night I misplugged a slim usbdrive which had the shield damaged, I guess I caused a short because the laptop turned off and never turned on again.

After taking it apart I noticed with the thermal imaging camera that two ICs on the mainboard reach 100 degrees Celsius. Thanks to the boardview I saw that they are PU8600 and PU8601. I tested the pins of these ICs and found these anomalies compared to the schematic

PU8600
6 (3VS5_LX) - 5 OHM to ground (normal?)
14 (3VS5VOUT) - SHORT TO GND
17 (+3VPCU) - SHORT TO GND
19 (3VS5_LX) - 5 OHM to ground (normal?)


PU8601
6 (5VS5_LX) - GND
19 GND - SHORT TO GND
20 GND - SHORT TO GND

Suggestions on how to proceed?