LA-9104p No display amp 0.145 ( no beep) Bios check Problem Soluction

LA-9104p No display amp 0.145 ( no beep) Bios check kiya sir kam ni bna bord me kafi jyada dust lga hua tha or kafi jagah moisture tha clean krne pr v same tha. Coil pr voltage v okk the fir v no display and same amp. Fir  mene 3521 ka case study dekha tha jo no display pr hi tha. Jaha apne btaya tha k cpu k back side mosfet pr drain and source ram voltage aana chaiye and gate 19v k aas pass hona chaiye mene check kiya to ek mosfet Qc3 pr supply ok tha and Uz1 pr drain voltage tha but source pr supply ni thi or na hi gate proper tha Mene mofet change kiya sath qz13 and qz11 kafi moisture tha inko v change kr diya . Uske bad check krne pr amp. Load 0.456 k pass aaya or 4 beep sound diya fir jaise apne btaya tha sdl scl path k mosfet ko remove krke jumper krne k liye to mene v jumper kr diya bord ok and working condition me aa gya 🙂🙂