• Legion 5 15ARH05H płyta NM-D281 Brak +3Vs +5VS oraz SUSP# pętla

It is currently 14 December 2024, 08:42

Legion 5 15ARH05H płyta NM-D281 Brak +3Vs +5VS oraz SUSP# pętla

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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 Legion 5 15ARH05H płyta NM-D281 Brak +3Vs +5VS oraz SUSP# pętla

by ukpicasso • 24 February 2024, 10:02
Pętla przy uruchomieniu Tutaj widać jak się zachowuje.
https://youtube.com/shorts/duwQGyFZxgE? ... CsR2fvRHZu
Brak obrazu, brak podśw. klawiatury, wiatraki nie ruszają.
Historia:
Laptop włączał się raz na 10 a potem przestał całkiem.

Co zmierzyłem do tej pory:
Brak sygnału SUSP# na pinie 124 kbc (UE1)
Brak 5VS i 3VS na UX2. Brak enablerow EN1 I EN2 (wynik braku SUSP#)
Rezystancja do GND UX2
pin1-2 (3.7k)
6-7 (14.1k)
8-9 (94k)
13-14 (6.6k)
5 (88k)
Na PU2001 RT6585CGQW jest 5V na pin 13 (LDO5) i 3V na pin 3 (LDO3)
SUSP jest na drenie QX6.
Napięcie baterii bios 3.1V, odpinana bateria.

Skończyły mi się pomysły. Dlaczego na kbc nie ma sygnału SUSP#??

Cewki pomiary napięcia przy włączonym i rezystancji przy wyłączonym
Image

Brak S3 S5 na PU2701
Image

Tu schemat dla UX2, bez SUSP# nie generuje si3lę 3VS i 5VS
Image

PU2001
Image

Re: Legion 5 15ARH05H płyta NM-D281 Brak +3Vs +5VS oraz SUSP# pętla

by Google Adsense [BOT] • 24 February 2024, 10:02

#2 Re: Legion 5 15ARH05H płyta NM-D281 Brak +3Vs +5VS oraz SUSP# pętla

by matic • 26 February 2024, 08:17
ukpicasso wrote:Napięcie baterii bios 3.1V, odpinana bateria.
Hello!
The BIOS battery does not exist. You probably mean the RTC (CMOS) battery. The voltage on this battery should be measured when it's connected to the board.
If the voltage on this battery is fine, replace the BIOS chip and flash it with old (original) dump. If it doesn't change anything, reflash the new BIOS chip with another dump.

Re: Legion 5 15ARH05H płyta NM-D281 Brak +3Vs +5VS oraz SUSP# pętla

by Google Adsense [BOT] • 26 February 2024, 08:17
 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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