• Dell Inspiron 5758 - nie uruchamia się

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 [SOLVED] Dell Inspiron 5758 - nie uruchamia się

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#1 Dell Inspiron 5758 - nie uruchamia się

by pawel1978 • 5 December 2023, 16:13
Witam. Na stole Dell Inspiron 5758, mb: AAL10 LLA-B843P rev 1.0. Po podłączeniu zasilacza laptop próbuje się uruchomić - pobór prądu dochodzi chwilę do 0,25A następnie spada do zera i pętla zaczyna się powtarzać. Obecne 3,3V na PL4502 oraz 5V PL4501 . Jest również 2,8V na cewce PL4401. Na pozostałych cewkach 0V.
POmierzone rezystancje:
PL4902 - 400ohm
PL8201 - 11ohm
PL8202 - 11,5ohm
PL4701- 135ohm
PL4801 - 0,5ohm

Proszę o potwierdzenie czy usterka leży po stronie uszkodzonego GPU ?

Re: Dell Inspiron 5758 - nie uruchamia się

by Google Adsense [BOT] • 5 December 2023, 16:13

#3 Re: Dell Inspiron 5758 - nie uruchamia się  [SOLVED] 

by matic • 5 December 2023, 21:33
pawel1978 wrote:PL4801 - 0,5ohm
Hello!
This resistance is definitely too low. It's a short circuit to ground.
Open the jumpers PG4828, PG4829 and measure the resistances to ground on both pads on any of these jumpers. If the short circuit is present on the system side (power rail "1D05V_S0") of the jumpers, perform a short circuit test described here. For a short circuit test limit the voltage to 1V.
Unfortunately the PCH part (small core) of the APU hybrid is very likely damaged.

#4 Re: Dell Inspiron 5758 - nie uruchamia się

by pawel1978 • 6 December 2023, 17:35
Thanks for the answers. Here are the measurements

PU4901
1 -0V
2- 0,01V
5-0V
6- 1,75V
9- 0,01V
12, 5,16V
15, - 5V
16- 0,02V
17 -5V

Both gaps are unsoldered. The short circuit does not occur on the PL4801 coil side. Perform a short-circuit test on one of the pads from the low-resistance side?

#6 Re: Dell Inspiron 5758 - nie uruchamia się

by pawel1978 • 7 December 2023, 10:24
APU damaged, thank you for your help

Re: Dell Inspiron 5758 - nie uruchamia się

by Google Adsense [BOT] • 7 December 2023, 10:24
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