Asus X512FF

Luís Amaral

Senior Member

Join Date: Nov 2013

Posts: 78

Country: Portugal
#1

Asus X512FF

05-09-2024, 08:30 AM

Hello guys, i am working on a X512FF motherboard that comes dead, 19V stops on first mosfet, Gate only have 3v... if a make a bypass laptops works great with no problem... already tested the 5 mosfets, if i remove the current sensor PRS8901, the 19v appear...
Something with the 19V line and the charger detects and stop working !

Any advices ?
Tags: None
Luís Amaral

Senior Member

Join Date: Nov 2013

Posts: 78

Country: Portugal
#2

05-13-2024, 02:13 AM

No one ? any tip ?
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mon2

Badcaps Legend

Join Date: Dec 2019

Posts: 13994

Country: Canada
#3

05-13-2024, 03:38 AM

Link a schematic if available but only using the dedicated schematic forum.

With no power to the board, meter in resistance mode, measure the resistance to ground on each side of PRS8901.

Post the measurements.
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Bonzas

Badcaps Veteran

Join Date: Jan 2018

Posts: 469

Country: Indonesia
#4

05-15-2024, 12:54 AM

what charging ic that used on the board ?
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Luís Amaral

Senior Member

Join Date: Nov 2013

Posts: 78

Country: Portugal
#5

05-23-2024, 12:05 PM

i solved the problem, it was one of the battery mosfets
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