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*Case study*
LENOVO B460
(09922-1)
Problem- DEAD
➡️DC READING 0.300-.320
👉STANDBY IC TPS51123 Is Heating
👉 check impedance of All Pins 👍
🤔🤔
👉Ic Replace With *Tps51125*
👉 👍 DC READING 0.011 Board Ready
👉Turn On Board Display Come At 1.095 Amp💥
2nd problem
👉after 40-50 second Dc READING reverse and Stuck At 0.137
👉 Standby IC heating
👉 i think ic faulty i replace it
👉 Again Same Display Come after 40-50seconds dc reading reverse and ic heating
👉 Then i replace all MOSFET and Capacitors in standby section
👉 But Same😅
👉🤔🤔
👉 Understand DC Reading💥🔥it going To S5 to S0 then s0 state Something Short
Then i started Reverse
👉Start From USB
In Onboard 5V_USB1_s0 Ok
👉But 5V_USB2_s0 is Showing 0.68v
💥 *TC9 Titanium Capacitor Of USB is Short* 💥 Remove It
💥 Case Done😄😄😄💥
More than 2 Hours laptop is Working Fine
👉💥Thanks *AFS DVD* 🥰
*Md.Rafi Sir* *AFS Solutions*
*Practical Workshop is Improving My knowledge and Skills Thank you Very Much Sir Love You*

✳️ Offer valid upto 10/5/2021 Only

💥 Contact suprio pal

💥 Happy birthday Bullet

Today case study 14-5-21
Board LA-C701P
Board recive full temperd
Problem 3v & 5v not genrate
1. 3.3v and 5v cap not available
Check impidence ok.. 330 ka cap add kiya and connect dc supply amp goes to 0.010 and back 0.004 press power button amp goes to 0.012 and back but coil voltage no genrate
3 remove jumper pad but same
4 when connect dc it come and goes mean ic ok
5 check ic it best cap miss
Add cap but same
6 check enable come from ec_on it not come I just short twizer 3.3v ldo to ec on and press power button board on
7 then I go to io... Kb9022 program io but same ec_on not come
8 check all Recuvarement see fine
9 tab meri nagar dc jeck par gayi... Dc jack undher se tuta tha adopter I'd and positive line short thi... Dc adopter_id line for testing purpose and connect dc supply and triger board on and display come... Dc jack nahi tha iss liye line cut kil..
Yeh motherboard meri city k bahut purane Tecnition se aya tha.. Aaj mujhe AFS student hone par proud ho raha hai...
Thank ko rafi sir... Iss board ko repair karne main mujhe 40 mint se bhi kam laga