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💥Case Study hp laptop, part number LA-C811P comes with in dead and liquid damage. 💥I open laptop find rust and & corrosion near core ic and charger ic. 💥Clean full motherboard and check any shorting. All good 💥Plug dc reeding goes to 0.0011 press power button laptop turn on and give display. 💥again i plug dc same reeding at that same time I connect battery also now reeding goes 11, 15, 0.007 back 11 💥for testing purpose I connect only battery and turn on laptop, laptop was turn on and give display now I connected dc now reeding 0.000. Removed battery also same. First fet not switch. 💥 first mosfet 0v on gate, remove discharging most same condition replaced first mosfet still same now i check charger ic requirement. 💥first vin for charger i have 3.48V back trace it found one resistor PRB6 10 ohm, one side 20v other side 3.48v check value showing value in Kilo ohm. I replaced that’s resistor now reeding back to 0.0011. 💥 Now i put back first mosfet laptop working fine and i put new discharging mosfet PQB13. Now connected battery and charger at same time and now battery also charging and laptop work fine. 💥💥💥Thanks to md Rafi Sir gives us 30 millisecond Technology💥💥💥

Case study Dell 3521 (LA-9104P) Fault - sometime on, display comes then shutdown within 1 minute and some time didn't on *Clue* - dc reading sometime 0.005 and sometime 0.003 👉 Clean the board 👉 Vin ok, 3/5v ok 👉 Check 3/5v output by DSO, there is little disturbance 👉 Replace output capacitor, now clear but problem not solved 👉 Check on/off switch - 2.3v and sometime 2.9v 👉 check impedance on Dc-Dc mosfets, output ok but input very low with buzzer 👉 Check LDO voltage, 5v ok but 3.3v not proper 👉 Apply flux and just resold all pins 💥 Boom Problem solved Display good and board continues on Think simple and stupid 🙏🙏🙏

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🩸🩸CASE STUDY🩸🩸🩸 .................................................................. 💥💥AJAY—>AFS —>FAMILY —>MEMBER💥💥 🌲🌲🌲TARGET 83/100🌲🌲🌲.............................................................................................................................. ..................................................................................................................................................................................................................................................... ❤️DEDICATED TO RAFI SIR FOR TEACHER'S DAY SPECIAL❤️ 💥💥💥::::::You have always been an excellent educator who knew exactly how to illuminate a soul with its own light. Happy Teachers' Day to my teacher!::::💥💥💥 ............................................................................................................................................................................................................................................................................................................................................................................................................... ❤️LAOPTOP ::::::SONY ❤️MOTHERBOARD::::HK1 ❤️PROBLEM :::::STAND BY IC BURNED..PRINT DAMAGED. ❤️FIRST REMOVED : IC AND 4 MOSFET'S. ❤️CHECKED: COIL AND LDO 5 IMPIDENCE.....::::GOOD: ❤️THEN DECIDED TO FIT BUCK MODULES... ❤️MAKED NOTE..........(19v....3V.....5V......5V LDO AND 15V FOR DC DC..) ❤️THESE ARE THE REQUIREMENTS. ❤️USED DAMAGED PC SMPS WIRE FOR CONNECTION. ❤️USED JUMPER WIRE FOR.....LDO 5V. ❤️USED 10K RESISTOR CONNECTED TO 19V LINE FOR DC DC SWITCHING PURPOSE. ❤️USED DOUBLE SIDE STICKER FOR FITTING. ❤️SUCCESFULLY COMPLETED SURGERY......TRIGGERED.............DC AMPHERE 1.185. ❤️CHECKED 2HR........NO PROBLEM... ❤️""""TOTAL COAST 130/- BENEFIT HIGH''''''' ❤️❤️SIR'S GUIDANCE...TRANSPARENT MARKER AND A3 PRINTOUT HELPED ME TO SOLVE FASTLY....❤️❤️