Thoshibha c640 not getting on
In DC Power reading 0.007,0.005 then 0.002
In coil value all or ok but
Sb sections voltage drop from 5v to 1v and 3.3 coil 3v to 1v
All mosfet is good but 1 capacitor is showing mm reading 0.47 finally I I'll remove that cap board getting on and display also coming all credits gosto Rafi sir 🙏thank you sir

💥 This is just sample of AFS students Case studies..
💥 May be more than 1000 available in AFS CASE STUDIES group

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Model govt laptop full Nvedia....
Pcb broken near Dc jack... First mosfet disaaperd. Lvds track full damaged. That's why 1 service centre gave back to dealer. I took challenge.it takes more than 15 days because of office schedule... Daily 🌟 half an hour work. Today I got leave for some health issue. Mean while I closed this case today. I charged more than 2000 thanks
Rafi sir... To give me such confidence in my repair life. Please give us small space in your big heart. ♥️♥️♥️

Case study 1: HP Pavilion DV6 AMD (Quanta LX89)
Problem: not power on with Battery, not charging but work with Adapter
Findings: check battery pins 3 MBDATA (3V), check pin 4 MBCLK (0.134v).
CHECK impedance PD2 to pin 3 batt resistors ok
Check impedance PD1 to pin 4 batt resistors ok
check impedance PD2 to pin 78 (I/O) ok
check impedance PD1 to pin 77 (I/O) ok
check R389 i/o voltage 3v ok
check r390 input 3v ok but output 0.134v not ok, change resistor same.
Then trace to a Zener diode PD1 (discover PD1 is leaky, replace it)
Booooom, POWER WITH BATTERY AND NOW CHARCHING.



Case Study 2: Acer Aspire One D270 (Quanta ZE7) DA0ZE7MB6D0
Problem: No power ON
Findings: check VIN line ok
Check standby IC requirement impedance and voltage all ok but no 3V and 5V at the coil.
Notice PC46 capacitor is leaky, remove and replace. Boooooooooooom
3V and 5V comes at the Coil, press power bottom, display comes.
Thanks to MD Rafi for impacting Knowledge. More Blessings…

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Assalamu Alaikum Gurudev

Keise ho

Mac Laptop

Coming Dead

💥1st i Chek Board Thoroughly
💥 No Corrution Found
💥 Then Chek All coil impedance OK
💥 Then i Chek voltage
💥 14.85v ok
💥 8.47v ok
💥 3.3v SB voltage ok
💥 Battery section voltage ok
💥 Then i Reflow the SOC
💥 Boom Job Done

💥 Case study by Riyaz, AFS STUDENTS..
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