• HP Probook 440 G9 - zwarcie

It is currently 26 June 2025, 23:26

 [SOLVED] HP Probook 440 G9 - zwarcie

 Forum rules: Click here to view the forum rules

  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
  2. Topic message should contain: the PCB marking code (required in case of hardware repairs), an extended description of problem, things you have checked/replaced/measured, your conclusions and the question. If you are not able to find the PCB marking code, please read THIS TOPIC. If you still cannot locate the PCB markings, please upload a clean, both-side photos of the mainboard - it is required to remove any films, modules or brackets possibly covering these markings.
  3. Before posting a new topic please read all topics in TRAININGS subforum and make a preliminary diagnostic based on the content of those trainings.
  4. Uploading of any complete schematics, BIOS / firmware files or any other kind of documentation, or linking to 3rd party websites with such files, is STRICTLY PROHIBITED. You can only upload the small portion of documentation or, link to BIOS file on UNVERIFIED BIOS FILES subforum, which simplifies the diagnostics/repair. You are not allowed to upload more then one complete page of instruction/schematic per single topic. The file you upload must not contain any watermarks, "confidential" markings, links or email addresses and cannot be password-protected.
  5. It is only permitted to describe one faulty device per single topic - you should always open a new topic for each subsequent device.
  6. Requesting of the full schematics, BoardView files, BIOS files or any other kind of documentation is NOT ALLOWED in this subforum. If you need to ask for any of these, you should open a new topic in DOCUMENTATION/BIOS REQUEST subforum.

#1 HP Probook 440 G9 - zwarcie

by tekort • 5 May 2025, 13:00
Witam,
Mam problem z HP z płytą DA0X8SMB8H1. Sprzęt nie reaguje na ładowarkę ani włącznik. Brak śladów zalania. Bez baterii RTC i po podłączeniu baterii głównej "miga" przez chwilę chwilę dioda w gnieździe ładowania po czym gaśnie, brak reakcji na włącznik. Na zaznaczonej cewce rezystancja wynosi 0,2Ω, zdjęcie płyty z internetu, żródło: IndiaMART

Próba zwarciowa 0,2 - 0,5V na padzie z niską rezystancją (~1Ω) skutkuje poborem rzędu ~1,5A - 3,8A, widać ze nagrzewają się wewnętrzne struktury płyty oraz strona PCH hybrydy - przy czym są to bardzo niewielkie temperatury rzędu 30°C. Na wszystkich pozostałych cewkach rezystancja w normie.

Proszę o informacje za jakie napięcie odpowiada te cewka? Niestety nie udało mi się znaleźć BV lub schematu do tego MB. Zakładam że hybryda umarła, ale może jest jeszcze jakaś iskierka nadziei, którą przeoczyłem...

Image

Re: HP Probook 440 G9 - zwarcie

by Google Adsense [BOT] • 5 May 2025, 13:00

#2 Re: HP Probook 440 G9 - zwarcie

by matic • 6 May 2025, 11:15
Hello!

Please post a clear picture of the area of ​​this coil with nearby surroundings.

#3 Re: HP Probook 440 G9 - zwarcie

by tekort • 6 May 2025, 13:11
Hello!

I hope pictures are clear enough, as they are not perfect. The resistor seen near FFR562 is 1R and measures as 1Ω, I must have smeared some solder on it when desoldering the coil that's why it looks bad.

TOP
Image
Image

BOTTOM
Image

#4 Re: HP Probook 440 G9 - zwarcie

by tekort • 8 May 2025, 09:47
The final conlusion is that APU hybrid is damaged & MB will not be repaired. I am closing the thread. Thanks for input!

Re: HP Probook 440 G9 - zwarcie

by Google Adsense [BOT] • 8 May 2025, 09:47
Similar Topics
[BIOS DUMP REQUEST] Wsad BIOS do HP Probook 440 G9 DA0X8SMB8H1
HP Probook 440 G9 DA0X8SMB8H1 - nie wyświetla obrazu
HP PROOBOOK 440 G9 DA0X8SMB8H1 REV:H identyfikacja elementów
HP PROOBOOK 440 G9 DA0X8SMB8H1 REV:H identyfikacja elementów.
HP Probook 440 G3 Orange Light Blink 9 times
Laptop HP Probook 440 G10 DA0X8TMB8E1 rev.E identyfikacja elementu

Who is online

Users browsing this forum: No registered users and 7 guests

_______________________________
All rights reserved. Unauthorised copying of this website's content or any of its part is strictly forbidden.
Any trademarks, brand names, products or services published on this website belong to their legal owners, are copyrighted and used for information purposes only.