• Lenovo x240 VIUX1 NM-A091 REV 1.0, nie zawsze się uruchamia

It is currently 29 June 2025, 21:51

Lenovo x240 VIUX1 NM-A091 REV 1.0, nie zawsze się uruchamia

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

#1 Lenovo x240 VIUX1 NM-A091 REV 1.0, nie zawsze się uruchamia

by Nox2 • 12 December 2023, 17:08
Witam, sprawa identyczna jak w tym temacie
lenovo-thinkpad-x240-nie-uruchamia-sie-gdy-jest-bateria-t57525.html?hilit=NM%20A091
Laptop posiada 2 baterie wewnętrzną i zewnętrzną. Po odłączeniu oby laptop odpala i działa normalnie. Po wpięciu baterii i wyłączeniu laptopa jest już brak reakcji na włącznik. Bios najnowszy 9 ze strony Lenovo) , RTC ma 2.98V ( sprawdzone również na nowej )
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Re: Lenovo x240 VIUX1 NM-A091 REV 1.0, nie zawsze się uruchamia

by Google Adsense [BOT] • 12 December 2023, 17:08

#2 Re: Lenovo x240 VIUX1 NM-A091 REV 1.0, nie zawsze się uruchamia

by matic • 15 December 2023, 10:28
Hello!

Measure the following voltages to ground, when the machine does not respond to pressing on the power button:
- On coils L3, L4.
- On pins 4, 5, 20, 21, 22, 23, 29 of chip U41.
- On pin 27 of ThinkEngine chip U101.
- On anode (pin 2) of diode D242.
- On capacitor C291.

Measure the voltage to ground on pin 39 of ThinkEngine chip U101 in the following cases:
a) Power button released.
b) Power button pressed.

#3 Re: Lenovo x240 VIUX1 NM-A091 REV 1.0, nie zawsze się uruchamia

by Nox2 • 15 December 2023, 11:22
Temat rozwiązany. W tym modelu przycisk od włącznika jest na tej samej taśmie co kamerka. Taśma została zgnieciona pod zawiasem i wszystkie kabelki od kamerki zwierały ze sobą. Wymiana taśmy rozwiązała problem. Jednak znalezienie tego nei było tak oczywiste. Dziękuje "matic" za odpowiedź. Nie wykluczone, że kolega "daro19862" będzie miał ten sam problem.

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Re: Lenovo x240 VIUX1 NM-A091 REV 1.0, nie zawsze się uruchamia

by Google Adsense [BOT] • 15 December 2023, 11:22
 This topic is marked as ARCHIVAL. Please only reply if your message contains the solution (Terms and Conditions p. 12.1).
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