• Dell G3 3579 mb: CAL53 - nie uruchamia się

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#1 Dell G3 3579 mb: CAL53 - nie uruchamia się


by pawel1978 22 May 2020, 09:05
Witam. Na stole Dell G3 3579, płyta CAL53 LA-F611P rev 1.0. Właściciel próbował wyczyścić samodzielnie układ chłodzenia. Po operacji notebook już się nie uruchomił. Po podłączeniu zasilania pobór prądu 0,5A - zaczyna nagrzewać się delikatnie GPU N17P-G1-A1 oraz wyraźnie mocno układ NPC61215D. Na cewkach przy GPU - PLV01, PLV02, PLV03 rezystancja do masy 0,6ohm. Proszę o pomoc w diagnozie , czyżby uszkodzony układ grafiki ?

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#2 Re: Dell G3 3579 mb: CAL53 - nie uruchamia się


by matic 22 May 2020, 09:11
Hello!

Measure the resistance on coil PLV01 in reference to resistor PRB01.

#3 Re: Dell G3 3579 mb: CAL53 - nie uruchamia się


by pawel1978 22 May 2020, 10:06
Thank you MATIC for your feedback. I didn't find the PRB01 but the PJB01 jumper goes 150kohm

#4 Re: Dell G3 3579 mb: CAL53 - nie uruchamia się


by matic 22 May 2020, 10:43
pawel1978 wrote:PJB01 jumper
Do you mean the jumper PJPB01?

If so, remove the ferite bead PLIV11 from the board and remeasure the power consumption of the board, when it is turned off without battery connected.

#5 Re: Dell G3 3579 mb: CAL53 - nie uruchamia się


by pawel1978 22 May 2020, 11:36
That was PJPB01. After desoldering PLIV11, the power consumption dropped to 0.28, after a few seconds the NPC61215D heats up again. GPU cold

#6 Re: Dell G3 3579 mb: CAL53 - nie uruchamia się


by matic 22 May 2020, 11:51
pawel1978 wrote:after a few seconds the NPC61215D heats up again.
Which chip is it?
This chip marking should be wrong. It probably should be NCPxxx (not NPC).

#7 Re: Dell G3 3579 mb: CAL53 - nie uruchamia się


by pawel1978 22 May 2020, 12:06
Yes, my mistake (my eyes are bad :)). The correct name is NCP81215D. What is this chip responsible for? It looks not very popular ...

#8 Re: Dell G3 3579 mb: CAL53 - nie uruchamia się


by matic 22 May 2020, 12:16
pawel1978 wrote:What is this chip responsible for?
This chip is CPU/GPU power supply controller chip.
It is bad for sure. Replace it.

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