• Asus Zephyrus G15 GA503R (DANJPMB3AA0 rev. A) - zwarte mosfety

It is currently 15 November 2025, 04:52

 [SOLVED] Asus Zephyrus G15 GA503R (DANJPMB3AA0 rev. A) - zwarte mosfety

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#1 Asus Zephyrus G15 GA503R (DANJPMB3AA0 rev. A) - zwarte mosfety

by ankheg • 29 October 2025, 01:20
Cześć,

Laptop jak w temacie, pasuje boardview od DANJPMB2AA0.

Na mosfetach PQ3502 i PQ3501 jest bardzo niska rezystancja między źródłem i bramką (ok.2ohm, w trybie diody 0.000). Wymieniłem mosfety na nowe z Aliexpress ale to nic nie pomogło. Nie mogę też zmierzyć rezystancji na cewce PL3500, multimetr nie pokazuje żadnego odczytu.

Nie jeste pewien czy to ma związek, ale wcześniej mierzyłem napięcia z podłączonym zasilaczem i niechcący dotknalem sondą multimetru okolicy portu ładowania. Poszla iskra i przypaliła się lekko ścieżka kolo pinu 1 PC5000. Oczyściłem, wymieniłem kondensator (chociaż nie był zwarty).

Macie jakieś pomysły co może powodować to zwarcie?

Re: Asus Zephyrus G15 GA503R (DANJPMB3AA0 rev. A) - zwarte mosfety

by Google Adsense [BOT] • 29 October 2025, 01:20

#2 Re: Asus Zephyrus G15 GA503R (DANJPMB3AA0 rev. A) - zwarte mosfety  [SOLVED] 

by matic • 1 November 2025, 18:30
Hello!

Such a low resistance is usually completely normal and it's caused by a MOS-FET driver integrated inside the controller chip. The low resistance usually disappears, when the board is powered.

What exactly is wrong with the board?

#3 Re: Asus Zephyrus G15 GA503R (DANJPMB3AA0 rev. A) - zwarte mosfety

by ankheg • 1 November 2025, 19:24
The board had a short on 3.3V and I think 5V as well. I have replaced a lot of shorted chips, including some USB, audio codec and KBC (not the main one). Also the CPU was faulty, 0,5ohm on the SoC rail. I have restored all the voltages before soldering new CPU, GPU was gettting warm. In the meantime I accidentally touched the charging port with a multimeter probe while connected to power supply. That's why I was worried if I damaged something in the charging circuit and found this low resistance when checking around. Now the new CPU is soldered, SoC rail around 12ohms, but I haven't powered it on yet. I have just arrived at my workshop, so perfect timing with your answer. I will try if the board work with the new CPU. Thank you for help, extremely useful as always!

Re: Asus Zephyrus G15 GA503R (DANJPMB3AA0 rev. A) - zwarte mosfety

by Google Adsense [BOT] • 1 November 2025, 19:24
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