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Joseph Ralte:
💨CASE STUDY💨
Model : Hp C701p
Problem : Cannot Switch on
Diagnose : First check vin 1st mosfett input 19v ok, check output side, no voltage and check mosfett gate, no voltage also, i tried to find the schematic but sadly, i didn't find any schematic for this board, so i have to work on datasheet, I've download datasheet of BQ25A charging IC, and check pin details, firstly check vcc pin no 20 and found no voltage, trace back the track of this vcc pin, and lastly i found out that this vcc track was cut, it comes from PD201(diode), and rebuild the track and finally the laptop woring fine,
Note: This laptop repair takes only 5 minutes, i am very happy, Many thanks to,Mr MD Raffi Sir, AFS Solutions, who gives me confidence, Love you❤️❤️❤️❤️
2 479
Watch "Nigeria Mustapha Tunde feedback on AFS SOLUTIONS CLASS" on YouTube
https://youtu.be/FO0BOBupANs
2 479
💥 🙏 Watch "Abdul Rasheed (NIGERIA 🇳🇬) Feedback on AFS SOLUTIONS ENGLISH BATCH" on YouTube
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2 479
Good morning everyone
Dell vostro 1400
Problems- press power button ampere goes to 0.200 then 0.440 then 0.10. Same repeating again and again. Means its like restating.
I checked for shorting there was no shorting. Then i check voltage on every output coil. All coils having voltage till restating.
Now i go for pwrgd section
I check sus_pwrok it was ok then i check run_pwrok there was no voltage. Basically its a AND GATE(both input must be high for proper work) pin 4 of u8b have 0v so i check for previous gate requirements of same pakage ic . Found pin 1 have also 0v.
Finally i connected pin 1 to pin14 run_pwrok came .
Laptop on display came.
Boooooom😊😊😊
Thank you rafi sir for your magical dvds🙏🙏
2 479
Watch "PRACITAL WORKSHOP 1ST LIVE CASE STUDY LENOVO NM-A361 NO DISPLAY" on YouTube
https://youtu.be/EyJA5r1kOfM
