• Thinkpad T480 NM-B501 nie przełącza na 20V

It is currently 14 December 2024, 10:54

Thinkpad T480 NM-B501 nie przełącza na 20V

 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.
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).

#21 Re: Thinkpad T480 NM-B501 nie przełącza na 20V

by carrneiro • 9 February 2024, 10:42
Wymienione U200.
Sytuacja bez zmian.

R10372 pin 1- 3,33V

carrneiro wrote:matic napisał(a):
- Between pin 2 of capacitor C9539 and pin 1 of capacitor C9540.

155k
matic napisał(a):
- Between pin 2 of capacitor C9541 and pin 1 of capacitor C9542

180k


Mam taką płytę z uszkodzonym procesorem.
Tam rezystancje są prawie identyczne.

Re: Re: Thinkpad T480 NM-B501 nie przełącza na 20V

by Google Adsense [BOT] • 9 February 2024, 10:42

#22 Re: Thinkpad T480 NM-B501 nie przełącza na 20V

by ctro • 9 February 2024, 13:56
Płyta z uszkodzonym procesorem wskakuje na 20V?
Sprobowałbym porównać wsad oraz ciąglość połączeń SPI z ścieżkami od USB-C i ostatecznie przełożyć U207.

#23 Re: Thinkpad T480 NM-B501 nie przełącza na 20V

by carrneiro • 9 February 2024, 17:08
Tak. Od razu na testerze mam 20V 0,4A. Pod palcem czuć że APU się grzeje.
W poniedziałek przeniosę elementy i porównam.

Re: Thinkpad T480 NM-B501 nie przełącza na 20V

by Google Adsense [BOT] • 9 February 2024, 17:08
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).
Similar Topics
  Lenovo ThinkPad L13, płyta 19837-1 - brak 20V po USB-C  [SOLVED]
  Laptop Lenovo ThinkPad E590 Płyta NM-B911 rev:1.0 - nie pracuje na zasilaczu  [SOLVED]
Lenovo ThinkPad E15 MB:JE442/JE542 Rev 1.0 NM-E211 Nie uruchamia się, nie ładuje bat
  Lenovo THINKPAD L14, NM-C631 - wentylator na max po włączeniu  [SOLVED]
Thinkpad L590 NM-B931, Nie uruchamia się
Lenovo Thinkpad P53 płyta nm-c261 brak obrazu na baterii kod 0001

Who is online

Users browsing this forum: No registered users and 1 guest

_______________________________
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.