• MSI MS-16R6 brak obrazu na matrycy

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#1 MSI MS-16R6 brak obrazu na matrycy


by TripleH 24 February 2025, 14:05
MSI MS-16R6
Płyta główna MS-16R61 R2.1
Laptop trafił do mnie z brakiem obrazu na matrycy po czyszczeniu i wymianie pasty.
Obraz przez HDMI wyświetlany jest poprawnie - laptop uruchamia się. Namierzyłem grzejący się PU21 czyli MP2143. Po wymianie już się nie grzeje, ale obrazu nadal brak. Na wyjściu PU21 jest 3.4V
Posiłkując się schematem od MS-16J91, gdzie ten układ jest wykorzystany do generowania napięcia PEX_VDD pomierzyłem napięcia i wyglądają ok, ale może coś przeoczyłem.
Napięcia PU21:
1 -5v
2 -5v
3 -3,4v
4 -0v
5 -3,4v
6 -0v
7 -0,6v
8 -3,3v
Testowałem również z inną matrycą i pomysły mi się skończyły. Co mogę jeszcze sprawdzić?

Re: MSI MS-16R6 brak obrazu na matrycy


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#2 Re: MSI MS-16R6 brak obrazu na matrycy


by ado 24 February 2025, 16:32
TripleH wrote:Ten układ jest wykorzystywany do generowania napięcia PEX_VDD.


Może pomiary napięć na złączu matrycy coś wniosą. Interesuje nas tylko eDP.
Edit:
A dlaczego nie zdiagnozujesz starej matrycy? Może to tylko bezpiecznik albo jakiś podrzędny kontroler uległ uszkodzeniu.

#3 Re: MSI MS-16R6 brak obrazu na matrycy


by TripleH 24 February 2025, 17:11
ado wrote:Nie mogę znaleźć dokumentacji do układu PU21. Czy możesz dodać jakieś poglądowe zdjęcie?


Do tego układu dostępny jest datasheet MP2143.
Schemat do MS-16J91 również jest dostępny. NIestety do MS-16R61 nie znalazłem.

#4 Re: MSI MS-16R6 brak obrazu na matrycy


by matic 24 February 2025, 18:11
TripleH wrote:Using the diagram from MS-16J91, where this system is used to generate the PEX_VDD voltage
On this board the chip PU21 generates the 3.3V for the LCD power supply.

When this chip failed, it's possible that a power surge occurred that damaged the LCD screen.
Test the machine with another LCD matrix. You can use any matrix with the same resolution as the original.

#5 Re: MSI MS-16R6 brak obrazu na matrycy


by TripleH 28 February 2025, 13:27
matic wrote:When this chip failed, it's possible that a power surge occurred that damaged the LCD screen.
Test the machine with another LCD matrix. You can use any matrix with the same resolution as the original.


You were right, as always. The new screen worked. I have tested other screens before, but in this laptop the screen is FHD and 144hz and I must have missed it. Now is working fine. Thank you.

Re: MSI MS-16R6 brak obrazu na matrycy


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