Dell 5520 Laptop comes which board is la-8241p in dead condition

📌 Dell 5520 Laptop comes which board is la-8241p in dead condition 📌 Connect with dc supply showing vin shot open and remove board 📌 Chk for physical found pq203 completely burn (image no.1) remove that mosfet and capasitor again vin line showing shot remove its pad and clean totally burning place (image no.2) 📌 Again showing shot when i inject voltage till 1.5 amp on clr sb ic 51125 was heat remove that ic now vin shoting is gone 📌 But now 5valw coil showing low impedance inject 2v on coil some thing heat near usb port its ui2 and ui3 ic remove that shoting was gone now replace all ic and mosfet. 📌 Inject 19v but no changes on dc supply. Chk i/o remove its sticker and found i/o also burn 🤦‍♂🤦‍♂ (image no.4) replace i/o and boom laptop was on and display proper Copyright Case Study For Learning