HP OMEN 15-ax204ns burnt component on the board

[Jag013]

Good afternoon everyone,
First of all, I’d like to apologize for my level of English.

I have an HP OMEN 15-ax204ns laptop, purchased in 2018, with the following specifications:

• Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz
• 4.00 + 4.00 GB RAM
• 1TB hard drive
• Product ID: 00325-96088-89605-AAOEM
• Operating system: Windows 10 64-bit

It is in its original state, with no hardware modifications except for the battery, which had swollen and was replaced with a compatible one.



For three or four months, I used the new battery without any issues, but one day it wouldn't charge past 20% — it just stayed stuck there. I searched online and found suggestions to disconnect the battery to reset it, which I did, and the problem disappeared — the battery charged to 100% again. However, a few days later, the same thing happened. I disconnected it again, and it returned to normal.

I measured the battery with a multimeter, and the readings were correct. I also used software to check the battery's health, and the results were satisfactory.

While working with the laptop on battery power, it suddenly shut down and I noticed a faint burning smell. I opened the laptop and found this component melted:



Currently, I’ve left the battery disconnected, and the laptop works perfectly when connected to the external power supply. However, one day I had an Arduino board connected to the USB port, and suddenly smoke started coming from one of the sensors attached to it. I discovered that the USB port was outputting 14 volts. I shut down the laptop, and when I turned it back on, the voltage was back to normal. This has only happened once, as far as I’ve noticed.

I’m an electronics hobbyist — I have tools, including a hot air soldering station — and I’m quite handy with repairs, but I need you to tell me exactly what to do. While I’m skilled with my hands, I don’t have deep electronics knowledge to know what to change or how to proceed. But if you’re willing to guide me step by step, I’ll be your hands.

Thank you very much for your help. I look forward to hearing from you.

[m1ch43lzm]

The burnt component is a capacitor, likely in parallel with the one next to it
It can be removed with no side effects, try with the soldering iron, adding leaded solder to both ends, as you have a plastic connector very close to it that can get burned with hot air

Usually that type of caps fail shorted

Remove the motherboard from the chassis first

If you wish to replace it, very likely it's a 10uF 25V 0805 size ceramic capacitor

[Jag013]

Thank you for your response. Did it short-circuit on its own, or could there be a component that caused it? Is there anything I can check?"

[m1ch43lzm]

Usually ceramic caps sometimes fail shorted on their own, sometimes you can see a tiny crack with a microscope
In your case it likely failed shorted, then burned until it's no longer a short

The exact cause of ceramic capacitor failure is unknown to me

[Jag013]

Thanks again for your help.
Would it be possible to get file Boardview?

Thank you

[m1ch43lzm]

I think its this one DAG35DMBAD0, the board number is under the keyboard connector; post #3
https://www.badcaps.net/forum/troubl...men-15-ax205ns

Burnt cap is PC2021, 4.7uF 25V 0805 size; according to the schematics and boardview