• Lenovo T490 - NM-B901 Rev 1.0

It is currently 5 April 2025, 12:17

 [SOLVED] Lenovo T490 - NM-B901 Rev 1.0

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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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#1 Lenovo T490 - NM-B901 Rev 1.0

by inventco • 27 March 2025, 10:57
Witam
Układ KBC to MEC1663-BA0
Staram się go odczytać ale cały czas mam że nie wykryto układu MEC
Jest ktoś może z Kolegów który odczytał ten układ na tej płycie ?
SVOD nie daję zadnego tutoriala jak to zrobić
A w internecie też nie widzę jak
czy wymagane są jakieś modyfikacje na płycie ?

JTAG ma podstawowe linie TMS TDI TDO CLK GND wypuszczone na złacze JTAG1 ale gdzie sygnał reset ? czy coś trzeba na płytce modyfikować czy powinien go odczytać od razu ? laptop ma się właczyć czy nie ....
Bedę wdzięczny za opis procedury.

Z góry dziękuję



temat do zamkniecia.
za pomocą YT znalazłem, które rezystory trzeba przełączyć by zrobić enable JTAG1
na schemacie jest to opisane ale błedne (przy tabelce) oznaczenia rezystorów na BDV jest ok.
R8714 i R8715

Re: Lenovo T490 - NM-B901 Rev 1.0

by Google Adsense [BOT] • 27 March 2025, 10:57
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