ACER 515-56G (LA-K092P) Not Power

[tipoti]

Hello,

There is no voltage on pin4 of the PQB3 mosfet. When I skip 1-2-3 with pin5, the device turns on. Of course it's not charging.
pqb3 and pqb4 don't have any shorts

can you help me thanks

[mon2]

Re: ACER 515-56G (LA-K092P) Not Power

Remove the series resistor on the gate pin. Do not lose it.

Power up again. Measure the voltage to ground of the same series resistor but at the charger IC pin.

What is the voltage?

[tipoti]

Re: ACER 515-56G (LA-K092P) Not Power

There is no voltage on pin1-2 of the PRB4 resistor, the resistor is OK

[mon2]

Re: ACER 515-56G (LA-K092P) Not Power

Remove PRB7 which is the ACDRV series resistor.

Then check again the ACDRV voltage to ground on the charger IC. It should be ~25v if the charger IC is trying to enable the 2*DCin mosfets.