• HP Envy x360 15-aq050nw po zalaniu brak 3.3V

It is currently 14 December 2024, 01:59

HP Envy x360 15-aq050nw po zalaniu brak 3.3V

 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 Envy x360 15-aq050nw po zalaniu brak 3.3V

by wojtas87 • 22 November 2024, 18:13
Czołem!

Laptop Hp Envy x360 15-aq050nw po zalaniu.

Płyta Marshmellow 15257-2 448.07N07

Klient na moją prośbę otworzył laptopa i wypiął baterię (była spuchnięta).

Płyta oczyszczona, skorodowane miejsca przelutowane. Nie ma wypaleń. Pod mikroskopem żadnych wad.

Po podpięciu zasilacza obecne jest 5V LDO, 3.3V LDO oraz 5V. Na linii 3.3V jest szczątkowe napięcie 0,5V. Pobór prądu 10mA.

Po wciśnięciu włącznika pobór prądu 20mA, ginie linia 5V. 3.3V i 5V LDO nadal aktywne.

Na próbę podstawiłem PU4501 na TPS51225C - bez zmian.


Proszę o pomoc.

Re: HP Envy x360 15-aq050nw po zalaniu brak 3.3V

by Google Adsense [BOT] • 22 November 2024, 18:13

#2 Re: HP Envy x360 15-aq050nw po zalaniu brak 3.3V

by matic • 12 December 2024, 10:58
Hello!

Measure the voltages to ground on pins 1, 5, 6, 9, 17, 20 of chip PU4501.

Re: HP Envy x360 15-aq050nw po zalaniu brak 3.3V

by Google Adsense [BOT] • 12 December 2024, 10:58
Similar Topics
HP Envy x360 15-fe0220nw mb LA-M794P rev 1.0 identyfikacja układu
  HP ENVY X360 15-EU0005NA 203037-2 nie włącza się, coś piszczy na płycie.  [SOLVED]
  HP Spectre X360 13" DA0X36MBAE0 REV E po zalaniu, brakujący element na płycie główne  [SOLVED]
  HP Envy x360-A Series No display  [SOLVED]
HP ENVY x360 - 15m-dr1011dx 18748-1 no display
[BIOS DUMP] HP Envy x360 Convertible 15M-DR SABA MB WHL_4 VRAM 18748-1

Who is online

Users browsing this forum: No registered users and 5 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.