• Lenovo Ideapad 15 15ALC05 - brak podświetlenia matrycy

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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.
  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.
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#1 Lenovo Ideapad 15 15ALC05 - brak podświetlenia matrycy


by pawel1978 10 January 2025, 11:28
Witam. Na stole Lenovo Ideapad 15 15ALC05 type : 82LN . mb HS553 NM-D701 rev 1.0. Laptop na początku uruchamiał się z czarnym ekranem, migała dioda power. Wgrany bios z badcaps ożywił sprzęt jednak uruchamia się teraz bez podświetlenia. Na szybko podstawiona inna matryca zachowuje się identycznie. Czy powodem brak podświetlania może być nieprawidłowy wsad bios ? Na płycie nie widać śladów uszkodzeń, zalania etc ...

Re: Lenovo Ideapad 15 15ALC05 - brak podświetlenia matrycy


by Google Adsense [BOT] 10 January 2025, 11:28

#2 Re: Lenovo Ideapad 15 15ALC05 - brak podświetlenia matrycy


by tekort 10 January 2025, 14:20
Sprawdź bezpiecznik matrycy FG2, prawdopodobnie jest spalony jeśli na obu matrycach nie ma podświetlenia. Znajduje się on od spodu płyty, mniej więcej pod złączem matrycy. Jego wartość to 1A, rozmiar 0402.

Na przyszłość przed odłączaniem matrycy/podłączaniem, odepnij zasilanie i zostaw sprzęt na 5-10 minut żeby upewnić się że konensatory są rozładowane i nie spowodujesz zwarcia. Możliwe też że to czysty przypadek, po to ten bezpiecznik tam jest :)

Re: Lenovo Ideapad 15 15ALC05 - brak podświetlenia matrycy


by Google Adsense [BOT] 10 January 2025, 14:20

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