Acer E5-574G No power, No Charging help needed

[KoPhyoe]

Board Model is DA0ZRWMB6GO REV:G and I found 19V on PQ22 and Gate has no voltage. Is that mosfet problem? Sorry for my bad english.

[mon2]

Re: Acer E5-574G No power, No Charging help needed

Start with carefully checking the voltages on each pin of charger IC at PU5 (BQ24780SRUYR). Post your measurements.

[KoPhyoe]

Re: Acer E5-574G No power, No Charging help needed

Start with carefully checking the voltages on each pin of charger IC at PU5 (BQ24780SRUYR). Post your measurements.

Pin 4 - 0.06 - 0.09V
Pin 6 - 2.64V
Pin 14 - 0.39V
Pin 17 - 0.14V
Pin 18 - 0.06V
Pin 19 - 0.14V
Pin 20 - 0.14V
Pin 24 - 6.06V
Pin 25 - 5.74V
Pin 26 - 0.14V
Pin 27 - 0.14V
Pin 28 - 19.31V
And the rests are 0V

[mon2]

Re: Acer E5-574G No power, No Charging help needed

PQ22 is probably defective but confirm it with resistance checks.

Remove all power. Meter in resistance mode.

Check the resistance across the mosfet:

Source (1-2-3) and drain (5-6-7-8)
Source and gate (4)
Gate and drain

Post each measurement. If the resistance is low, the mosfet is defective.

PQ22 is a very typical mosfet and can be replaced with many others.

[KoPhyoe]

Re: Acer E5-574G No power, No Charging help needed

PQ22 is probably defective but confirm it with resistance checks.

Remove all power. Meter in resistance mode.

Check the resistance across the mosfet:

Source (1-2-3) and drain (5-6-7-8)
Source and gate (4)
Gate and drain

Post each measurement. If the resistance is low, the mosfet is defective.

PQ22 is a very typical mosfet and can be replaced with many others.

Sorry for my late response ;

Source and Gate - 4.35 MΩ
Source and Drain - 00.85 MΩ

[mon2]

Re: Acer E5-574G No power, No Charging help needed

Measure also

Gate and drain

[KoPhyoe]

Re: Acer E5-574G No power, No Charging help needed

measure also

gate and drain

5.69 megaΩ

[Sephir0th]

Re: Acer E5-574G No power, No Charging help needed

If there is no unexpected Short around PU5 you should proceed with replacing it (PU5).