hi guys

here is a laptop that not detect charger
it mean when i plud adapter,it not hav any reaction
no battery charging,no power on

but it work good when buttery is pluged

when adapter connected,i hav 3.3 on power key and BQ24740VREF,but main 3.3&5 is off

what should i do?!

проверь обвязку BQ24740VREF на этой платформе если не ошибаюсь есть маленький транзистор возле разъёма щлейфа матрицы проверь бывает пробит

can u type english plz?

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Posted after 1 hour 16 minutes 3 seconds:
When i plug battery, it hav 3.3 on bios
But it isnt with adapter

Any idea?

Measure the voltage on the contacts bq24740 without battery :
5, 10, 13, 24, 28

Pin5=2.6v
Pin10=3.3v
Pin13=5.0v
Pin24=2.5v
Pin28=5.7v

Pin28 must be 19v.
Pin24 must be 6v.

There must be a supply voltage 19 v
This line goes from 28 pin on the MOSFET , which is next to the connector of the connection matrix. This MOSFET switches power BQ.
Take a multimeter , set it to mode continuity check (resistance measurement) and look for the MOSFET. Perhaps it is defective.

I find that mosfet and replace that
Pin 28is 19v now

It work fine
Tnx all friends for help:-)