• MSI B150M PRO-VDH - Nie uruchamia się

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 [SOLVED] MSI B150M PRO-VDH - Nie uruchamia się

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  1. Topic title should contain: the device's manufacturer, full model and the brief description of problem.
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#1 MSI B150M PRO-VDH - Nie uruchamia się

by lock99 • 9 February 2022, 11:53
Cześć
Proszę o pomoc w naprawie płyty głównej od komputera stacjonarnego.
Płyta przestała się uruchamiać po wyłączeniu komputera przyciskiem zasilania na zasilaczu.
Teraz nie reaguje na wciśnięcie klawisza zasilania, nie zapalają się żadne kontrolki.
Przeprogramowałem BIOS wsadem ze strony MSI - bez zmian.
Złącze ATX
n.9 - 5.14V
n.16 - 4.2V (nie spada do 0 po wciśnięciu przycisku zasilania)
reszta 0V

Na przycisku zasilania jest 3V, żadnej reakcji po wciśnięciu.
Bateria ma 3V

KBC
n.1 - 0V - 42Ω
n.46- 3.3V
n.60 - 0V
n.61 - 3.3V
n.82 - 0V
n.84 - 0V
n.101 - 0V - 32Ω
n.110 - 2V
Image

Re: MSI B150M PRO-VDH - Nie uruchamia się

by Google Adsense [BOT] • 9 February 2022, 11:53

#2 Re: MSI B150M PRO-VDH - Nie uruchamia się

by lock99 • 11 February 2022, 10:01
Czy ktoś z kolegów ma jakiś pomysł, jak to dalej ruszyć, utknąłem z tą płytą :(

#3 Re: MSI B150M PRO-VDH - Nie uruchamia się

by matic • 12 February 2022, 12:07
Hello!

- Measure the voltage to ground on pin 6 of chip U25.
- Measure the voltages to ground on pins 1, 4, 5 of chip U26.
- Measure the voltages to ground on pins 11, 63, 64, 66, 73, 108, 116 of KBC chip.

- Measure the voltages to ground on pins 60, 61 of KBC chip in the following cases:
a) Power button released.
b) Power button pressed.

#4 Re: MSI B150M PRO-VDH - Nie uruchamia się

by lock99 • 12 February 2022, 14:15
U25
n.6 - 0V - 0.6Ω

U26
n.1 - 2.9V
n.4 - 2.9V
n.5 - 2.9V

KBC
n.11 - 3.3V
n.63 - 2.2V
n.64 - 0V
n.66 - 0V
n.73 - 3.3V
n.108 - 3.3V
n.116 - 1.5V

n.60 - Power button released - 0.02V, Power button pressed - 0V
n.61 - Power button released - 3.3V, Power button pressed - 0V

#5 Re: MSI B150M PRO-VDH - Nie uruchamia się  [SOLVED] 

by matic • 12 February 2022, 15:49
lock99 wrote:U25
n.6 - 0V - 0.6Ω
It is a short circuit to ground.
Perform a short circuit test described here on pin 6 of chip U25. Limit the voltage to 3V.
The PCH chip is very likely damaged.

#6 Re: MSI B150M PRO-VDH - Nie uruchamia się

by lock99 • 14 February 2022, 18:30
Przy próbie zwarciowej, bardzo mocno nagrzewał się PCH. Przy cenie tej płyty naprawa nie opłacalna. Zakupiłem cała płytę.
Dziękuję Matic za pomoc.

Re: MSI B150M PRO-VDH - Nie uruchamia się

by Google Adsense [BOT] • 14 February 2022, 18:30
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