• Lenovo IdeaPad L340-15IRH Gaming - brak obrazu na matrycy

It is currently 14 December 2024, 07:42

 [SOLVED] Lenovo IdeaPad L340-15IRH Gaming - brak obrazu na matrycy

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#1 Lenovo IdeaPad L340-15IRH Gaming - brak obrazu na matrycy

by siwypp • 27 May 2024, 12:40
Pacjent IdeaPad L340-15IRH, mobo: NM-C361 rev 1.0

Dostałem laptopa w którym klient nieudolnie zmieniał taśmę matrycy. Nie daje obrazu na matrycę, na HDMI działa bez zarzutu.
Uszkodzony był bezpiecznik F3, po wymianie napięcie +LEDVDD wróciło, DISPOFF# miał ok. 1.2V, po wymianie KBC podczas gdy powinien wyświetlić obraz mamy 0V.
+LCDCDD_CON 3.2V

W systemie w ogóle nie wykrywa matrycy. Które piny są za to odpowiedzialne?

Syganał INVT_PWM ma 5ohm, chyba mamy winowajcę, ktoś potwierdzi?

Re: Lenovo IdeaPad L340-15IRH Gaming - brak obrazu na matrycy

by Google Adsense [BOT] • 27 May 2024, 12:40

#3 Re: Lenovo IdeaPad L340-15IRH Gaming - brak obrazu na matrycy

by siwypp • 27 May 2024, 16:28
Machine wrote:With that resistance value you have a short.


I removed R19 and pin 1 have 5ohm, so PCH is partly faulty right?
Image

#5 Re: Lenovo IdeaPad L340-15IRH Gaming - brak obrazu na matrycy

by siwypp • 28 May 2024, 13:01
Thanks, thank you.

Re: Lenovo IdeaPad L340-15IRH Gaming - brak obrazu na matrycy

by Google Adsense [BOT] • 28 May 2024, 13:01
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