Dell Vostro 3560 no power :'(

Hello everyone,

My problem is i flashed unfortunately bios bigger than chip size ( yes i know im rly idiot) :/ then laptop shutdown suddenly in prosses with little power i mean the mouse i have is RGB light so its have low light now this is when AC power adaptor connected but if i unplug it with only battery connected when i press power button the mouse light appear then when i remove my finger from it light gone but no power @ all

so i tried this methods:

First i thought maybe there's some stuck charge in mobo so i removed whole things i mean whole just mobo with power button + cmos battery also then pressed power button for +30 secs

second i flashed the right bio hard way with spi programmer i did it before many times when the mobo was worked before for testing purposes

so still same problem i think now its maybe short in circuit or smd caps or mosfet dead or something i dnno :'(

so im not pro with hardware components but i need someone guide me what to do with multimeter to test figure out whats components dead to replace instead of replace the whole mobo cuz i cant do it and even send it to technical repair shop cuz it cost here so much $$ yes i mean it

so this is my schematic >>

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