PD1 and PD2 for HP Omen15-dh1005na

[irfan-1]

Hiya i had a problem with my laptop which is HP OMEN 15-DH1005NA, it stopped working and the LED charging light stopped working, it stopped charging the battery aswell it was completely dead, I started checking the ac adapter to see if the voltage is going through and that ended up fine, so i had to check on the motherboard itself, i took it out and checked the power port if the voltage is going through and that looked fine, i checked a little futher where i saw 2 components PD1 and PD2 after checking the voltage it looked very odd to me which i have sent the results in the picture below, i tried to look for the schematic but couldn't fine anything for days,
The 2 components i found was PD1 and PD2 which results was odd but i don't have any clue what they are? and what they are used for? i will send a picture of it below, if anyone knows what they are for and what the voltage should be than please let me know so i can get this laptop up and running again

Thank you

[mon2]

See attached. Believe the linked parts are ESD diodes.

Each will trigger if there is a transient higher than the threshold voltage.

[irfan-1]

That makes sense why everything has stopped working on the laptop, from the results do you think they both must have blown and need to be replaced?

[irfan-1]

Hiya if i need to replace both i have looked around the internet but there are so many and different esd tvs diodes? I don't even know which one is main because all it says is cm2, so which one should i buy to replace?

[mon2]

At this time, we do not know if these parts are damaged or not. If there was a true ESD event then yes the part is sacrificial and would shunt itself to ground and prevent further use of the part.

To check, remove all power. Meter in resistance mode. Measure the resistance to ground of each of the pins on the side with the 2-pins. The single pin side is ground. We are checking if either of the internal diodes are blown.

Post the resistance measurement for each of these parts.

Then, configure the meter in DIODE mode. Place the red meter probe to ground = single pin side of the part; black meter probe onto the 2-pin side. What is the measurement? Repeat for the other pin on the part. Repeat for the 2nd CM2 part.

We are again checking if the diode is blown from an earlier ESD event.

[irfan-1]

Hiya thank you for helping me i have test which you have said,
on resistance mode as you said i added the red probe on the top pin and the black one on the bottom 2 pin the results i got is as follow:

PD1 - bottom right 20.03k, bottom left 0L

PD2 - bottom right 0.92k, bottom left 0.92k

on diode mode as you said i added the red probe on the top pin and the black one on the bottom 2 pin the results i got is as follow:

PD1 - bottom right 0.748, bottom left 0.749
PD2 - bottom right 0.648, bottom left 0.648

Thank you

[mcplslg123]

PD2 seems suspicious.

[irfan-1]

Is there any way i can check to find out if it's 100% faulty?

[irfan-1]

I was checking on different chips for the voltage but on one chip i saw a spark, can you have a look what that chip is? I don't understand why it blow up the corner lead when i was just checking the voltage?