ACER ASPIRE A515-52G CAN ON BUT NO DISPLAY, NO POWER AT VCC_GT

[Bonaventure Vigil]

Dear All,
Please really2 need Help on this Acer A515-52G Motherboard Compal EH5AW LA-G521P Rev: 1A.
At first this laptop can on, keyboard light on but no display. Open the motherboard, found out the PQZ3 Mosfet and PUZ3 ic near it burn. Refer picture below. Then I replaced both. All the power rail 3.3,5,1.2, 1.35, 0.8V have power back after i turn on the laptop except for the VCC_GT rail. Voltage at Power Supply showing 0.000A before turn on, after turn on it became 0.5 0.6A. Seem cannot boot and still no display. Then I replaced the PUG1 and mosfet, but the VCC_GT still no power. Only no more short. Anyone can help me on this.


The schematic burn PQZ3 mosfet and PUZ3 IC is below

Boardview

After power on, no power at VCC_GT rail, I replaced PUG1 and mosfet PQG1.Refer schematic below. During checking the power of PUG1, the voltage available is Enable voltage 5V, VCC 5V, Boot 4.8V, PWM 2.5V but no power on pin for UGATE, PHASE and LGATE. Seem the mosfet PQG1 not switching on. Anyone can give advise what other things i should check, maybe i miss something. All the caps and resistor seem ok.

[mcplslg123]

PQZ3 is high side mosfet.Since it got burnt,19V reached SOC.So simply the SOC is damaged and replacing the SOC along with driver IC and upper/lower mosfet on gfx line will give display.
Else simply waste of time. Unfortunately ,every other mb on SOC architecture has this fate.

[Bonaventure Vigil]

Thank you @mcplslg123, which one soc you referring? is it EC or something more worst? Apologize since I'm still new learner. Is it worth to repair? May you assist me check which soc number in the schematic i provided below, maybe i can trace back and order new. Fyi, after i replaced PQZ3, it has output 0.8V for +VCC_CORE. Only no output at PQG1 for +VCC_GT rail. That's the only one left no power after I turn on. I replaced IC driver PUG1 and mosfet PQG1 also no fate. Below the voltage output i trace from PUG1:
PUG1 power is below:
1.EN=5.08
2.PHASE=0
3.UGATE=0
4.BOOT=4.8
5.PWM=2.5
6.PGND=0
7.LGATE=0
8.VCC=5.18


Link to schematic - https://www.badcaps.net/forum/troubl...21#post1521821

[rogfanther]

Something worst. In your picture, the SOC ( processor ) is what is under the cooling parts, near where you draw the 0.8 and 1.1V arrows.

[mcplslg123]

SOC=System on Chip which is made of Processor and PCH combined together on a single chip.