HP DESKTOP BRANDED BOARD PROBLEM- DEAD TESTING & SOLUTION

CASE STUDY 15 HP DESKTOP BRANDED BOARD PROBLEM- DEAD TESTING & SOLUTION- SIR YE BOARD VIN SECTION WALA THA, MEANS ISME SMPS NHI THA, ISKA SCHEMATIC BHI NHI THA, VIN SECTION OK THA STEP DOWN KI EK COIL PE 3.3V THA. DUSRI PE 0V. STEP DOWN IC K PAAS CAPS CHECK KIYE TO 3.3 AND 5V MILA. MEANS LDO OK THA, KISI COIL PE SHORTING NHI THI. DC TO DC IC K OUTPUT KA IMPIDANCE BHI OK THA, PHIR BHI DC TO DC IC REMOVE KIYA, CIRCUIT KO BREAK KRNE K LIYE LIYE, TO 5V COIL PE BAN GYA, THEN DC TO DC IC CHANGE KRNE SE PHLE DC TO DC KO DIRECT JUMPER KRKE DEKHA, BOARD ON, DISPLAY CAME. TIME TAKEN- 20 MIN.