hp omen 15-dh1015nl does not turn on

[giulio93]

Hi everyone, I have this gaming laptop that during the usage suddenly shutted down. I disassemble it and take some mesurments. I have a lab supplier and a thermocam. I tryed injected voltage at the DCIN connector and I see this little chip went up to 85 deg (at 19V) this chip should control the battery charge. Next i mesure the resistence at the big coils on top of it and the value is 0,4ohm so dead short.. Those 4 phases are the power supply of the Nvidia GPU?
I tried to inject 1V at that coil and i get 1.35A dwawn but nothing heat up

[mon2]

Do not worry about the GPU rails as GPU devices, in general, will have a low resistance to ground and this is by design.

What are the top side markings of the part that is heating up to 85 deg?

[giulio93]

Do not worry about the GPU rails as GPU devices, in general, will have a low resistance to ground and this is by design.

0,4 ohm is still a normal value? I hope i did not damge anything with the injection. Fortunatelly i stay low at 1V
What are the top side markings of the part that is heating up to 85 deg?

Intersil 88739A
W00f4K

[mcplslg123]

Never play with voltage injection unless you know the risks. A gpu rail resistance could be as low as 0.1 ohms and thats fine.

Anyway, voltage injection rarely helps in case of gaming boards.

[giulio93]

Never play with voltage injection unless you know the risks. A gpu rail resistance could be as low as 0.1 ohms and thats fine.

Anyway, voltage injection rarely helps in case of gaming boards.

Knowing that i only use 1V so i don't think i burnt something. Also my concern is about the Intersil chip. This is my suspicius. The chip itself or some caps on ony pin of it is shorted to gnd. I also notice that no V come in in the step down converter and possibly because the logic of the I/O chip is check the battery status before enable the step down convert. Can be?

[giulio93]

Do not worry about the GPU rails as GPU devices, in general, will have a low resistance to ground and this is by design.

What are the top side markings of the part that is heating up to 85 deg?

The new Intersil Chip arrived from Aliexpress. I tried to solder it on the mobo but it seams like the new chip doesn't take any solder but on the gnd central pad. Why? It is normal? How can i fix that?
Thanks

[giulio93]

Do not worry about the GPU rails as GPU devices, in general, will have a low resistance to ground and this is by design.

What are the top side markings of the part that is heating up to 85 deg?

I think now i solder the chip well and i have the same problem as before. Some of the nearby lines get shorted and chip chip reach immediately 90° if the charger is plugged in. Can anyone can help me figuring out the problem?
Thanks

[giulio93]

Never play with voltage injection unless you know the risks. A gpu rail resistance could be as low as 0.1 ohms and thats fine.

Anyway, voltage injection rarely helps in case of gaming boards.

I don't understand the theory. With the chip on board the I have some shorted linea around It, if i remove It the short disappears. So the problem should be the chip? Isn't It?

[giulio93]

Do not worry about the GPU rails as GPU devices, in general, will have a low resistance to ground and this is by design.

What are the top side markings of the part that is heating up to 85 deg?

I have some updates. I found the EMB09 A03 faulty (it was shorted) so I order it and today I replace it. Now I have this situation, around the Intersil chip i mesure 5V 3.1V and 1V ish. So I suppose the chip is working fine, but the mobo seams death. The gate of the first mosfet after the 19V power in is 0V so the mosfet is closed. I tried also to connect the battery but nothing changed. Also I don't know if it is normal but on the resistor above the battery i measure 0V. If I measure pin to pin on the battery (disconnected from the mobo) I obtain 3,1Vish from all the cells, but if i plugged it in no more voltage from the cell is shown.
May be important, the laptop stops work because a screw in the battery zone (near the intersil and the EMB09) drop on the motherboard.
Please I really want to fix this laptop, i feel it's reparable

[giulio93]

Never play with voltage injection unless you know the risks. A gpu rail resistance could be as low as 0.1 ohms and thats fine.

Anyway, voltage injection rarely helps in case of gaming boards.

Update, i order a new battery (not original) to test. Now I have the 12V on the resistor After the battery, but again the mobo doesn't start. The gate of the 2 firsts MOSFET Is Still at 0. Can you help me?

[giulio93]

Guys?

[mcplslg123]

Measure voltage on all pins of chrging IC(only adapter connected) and post it here. Be careful while measuring.
Measure resistance between
Source-Drain
Source-gate
gate-Drain

of 2 dc-in mosfets.

Check connectivity of CLR to charging IC pins.

Check resistance to GND on CLR.

[giulio93]

Measure voltage on all pins of chrging IC(only adapter connected) and post it here. Be careful while measuring.
Measure resistance between
Source-Drain
Source-gate
gate-Drain

of 2 dc-in mosfets.

Check connectivity of CLR to charging IC pins.

Check resistance to GND on CLR.

Thank you very much for your reply.
As soon as i come back home i'll do the measurments.
2 things: I don't Remember what the CLR Is and It I Remember well i have no 19V at any PIN of the ISL chip (but if I plugged the battery in I have the 12V at some pins)

[giulio93]

Measure voltage on all pins of chrging IC(only adapter connected) and post it here. Be careful while measuring.
Measure resistance between
Source-Drain
Source-gate
gate-Drain

of 2 dc-in mosfets.

Check connectivity of CLR to charging IC pins.

Check resistance to GND on CLR.

Checking all the pins i burnt the chip and replace it. Now I have the 25V on the first Mosfs!!!! I report anyway the pin's V ( the 3 missing was too risky to measure)

PIN 1 = 2,666V
PIN2 = 0,06
PIN3 = 0,06
PIN4 = 0,06
PIN5=0,03
PIN6=0
PIN7=0
PIN8=0
PIN9=0
PIN10=0
PIN11=5.3
PIN12=0
PIN13=0
PIN14=0.06
PIN15=0,06
PIN16=3.14
PIN17=0.99
PIN18=19.6
PIN19=5.24
PIN20=5.24
PIN21=
PIN22=0.06
PIN23= START FROM 1.3 DOWN TO 0.2
PIN24=4.9
PIN25=0
PIN26=0.03
PIN27=17.3
PIN28=12.11
PIN30=
PIN31=19.98
PIN32=19.98

Now I have tried to connect the mobo at the pc chassic with some flat, but no power on and no charging light. The battery is at 11.4 and when I plugged the power cable goes to 11.9V so it seams that is charging it but I wait 5 mins and the V doesn't go up. What should I chek now?
Thanks for your support I REALLY appreciate it

[giulio93]

I check around the I/O chip an I have no Voltage so the laptop cannot power on obviusly. But why no power on the I/O chip!!
I wish I have the ISL datasheet with the pinout to better understand if some V is missing!

[giulio93]

Measure voltage on all pins of chrging IC(only adapter connected) and post it here. Be careful while measuring.
Measure resistance between
Source-Drain
Source-gate
gate-Drain

of 2 dc-in mosfets.

Check connectivity of CLR to charging IC pins.

Check resistance to GND on CLR.

Here the solder joint. They seam fine to me, what do you think?

[mcplslg123]

CLR stands for current sensing(limiting) resistor.Usually located after 2 dc -in mosfets.

Charging IC seems properly soldered,however, ACOK is pulled low.

You have not shared the resistance readings of 2 dc-in mosfets .

Measure voltage on pin 1/4/8 od 2 dc in mosfets also.

You bburnt the ic while measuring 'coz your multimeter probes are thick.Get a needle sharp pair of probes.

[giulio93]

CLR stands for current sensing(limiting) resistor.Usually located after 2 dc -in mosfets.

Charging IC seems properly soldered,however, ACOK is pulled low.

You have not shared the resistance readings of 2 dc-in mosfets .

Measure voltage on pin 1/4/8 od 2 dc in mosfets also.

You bburnt the ic while measuring 'coz your multimeter probes are thick.Get a needle sharp pair of probes.

Thanks for reply. The 19V now passes the CRL so I think before It the 2 mosfs work fine but i Will take the measure you ask for anyway.
I have Sharp probes but the PIN are so close that Is Easy yo touch 2 pins.
What Is AOCK?
It Is normale that a lot of pins are at 0V?

[giulio93]

CLR stands for current sensing(limiting) resistor.Usually located after 2 dc -in mosfets.

Charging IC seems properly soldered,however, ACOK is pulled low.

You have not shared the resistance readings of 2 dc-in mosfets .

Measure voltage on pin 1/4/8 od 2 dc in mosfets also.

You bburnt the ic while measuring 'coz your multimeter probes are thick.Get a needle sharp pair of probes.

the mosfets measure the same: D-S 3 or 7 MOhm depending the probe side; S-G 5.5 MOhm; D-G 7 to 9 MOhm.
Connection between CLR and PIN 32 of the IC.
19.98V on S and D of each mosfet and 25V on Gate

[mcplslg123]

ACOK is pin on charging IC and its should be high indicating presence of a valid adapter and dc-in is correct. Refer to any schematic with same ISL739 chip eg, dell inspiron 3567 15341-1 mb.