• HP Probook 440 G9 - zwarcie

It is currently 26 June 2025, 23:24

 [SOLVED] HP Probook 440 G9 - zwarcie

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#1 HP Probook 440 G9 - zwarcie

by tekort • 5 May 2025, 13:00
Witam,
Mam problem z HP z płytą DA0X8SMB8H1. Sprzęt nie reaguje na ładowarkę ani włącznik. Brak śladów zalania. Bez baterii RTC i po podłączeniu baterii głównej "miga" przez chwilę chwilę dioda w gnieździe ładowania po czym gaśnie, brak reakcji na włącznik. Na zaznaczonej cewce rezystancja wynosi 0,2Ω, zdjęcie płyty z internetu, żródło: IndiaMART

Próba zwarciowa 0,2 - 0,5V na padzie z niską rezystancją (~1Ω) skutkuje poborem rzędu ~1,5A - 3,8A, widać ze nagrzewają się wewnętrzne struktury płyty oraz strona PCH hybrydy - przy czym są to bardzo niewielkie temperatury rzędu 30°C. Na wszystkich pozostałych cewkach rezystancja w normie.

Proszę o informacje za jakie napięcie odpowiada te cewka? Niestety nie udało mi się znaleźć BV lub schematu do tego MB. Zakładam że hybryda umarła, ale może jest jeszcze jakaś iskierka nadziei, którą przeoczyłem...

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Re: HP Probook 440 G9 - zwarcie

by Google Adsense [BOT] • 5 May 2025, 13:00

#2 Re: HP Probook 440 G9 - zwarcie

by matic • 6 May 2025, 11:15
Hello!

Please post a clear picture of the area of ​​this coil with nearby surroundings.

#3 Re: HP Probook 440 G9 - zwarcie

by tekort • 6 May 2025, 13:11
Hello!

I hope pictures are clear enough, as they are not perfect. The resistor seen near FFR562 is 1R and measures as 1Ω, I must have smeared some solder on it when desoldering the coil that's why it looks bad.

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#4 Re: HP Probook 440 G9 - zwarcie

by tekort • 8 May 2025, 09:47
The final conlusion is that APU hybrid is damaged & MB will not be repaired. I am closing the thread. Thanks for input!

Re: HP Probook 440 G9 - zwarcie

by Google Adsense [BOT] • 8 May 2025, 09:47
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