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Forwarded from Ifraj
*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*
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*
AFS CHANNEL
✳️ Offer valid upto 10/5/2021 Only
💥 Contact suprio pal
Forwarded from Sapan OP Taneja
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
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
AFS CHANNEL pinned «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…»
Forwarded from Srinivash Rao
Case study
Hp 15-ac (LA-C701P)
Problem - With in 10-15 mins Laptop shutdown
Clue - Display comes at 0.640 amp
👉 Open and clean the fan and heatink, put new cooling paste and check - but same
👉 Check components for any heat using infrared thermometer, found PL14 (+vcc_core) coil is excessively heating
Little nervous 😟
👉 Start remove components 1 by 1
remove PC78 & PQ13 but same , put PQ13 back
Replace - PCZ42
Display comes at 0.550 amp (amp decreased) But still PL14 was heating
Replace PL14
💥 Heating issue - cleared
Display comes at 0.460 amp and laptop continue on (shutdown problem solved)
Next day morning
Problem no.2 - Laptop Dead
After triggering amp goes 0.077 and come back to 0.008 (ac led glows)
👉 Check all coil impedance, found
PL8 (+5v alw) low impedance &
Pc40 (+3v alw) damaged
CMOS socket also little bit damaged
👉 Replace both standby output capasitor - but +5v impedance same
👉 Remove PJP3 jumper , now jumper's output and input side impedance ok
👉 Problem in jumper solder, so resold it and check.
💥 Board on and Display ok
Problem no. 3
Laptop Hang in both Bios and hdd boot
Start isolation all connection but found problem in motherboard
👉 Add PC118 ( 19v purification which is connected to upper mosfet ) but same
👉 Again replace PL14 & PCZ42 but same
👉 Replace Bios chip and programmed a new file
💥 Hanging issue - cleared
Problem no - 4
Late Display
Before solve this issue, 1st I go for OS installation after OS complete
Open bios chip , cleaned ME using MEinject
💥 Display comes with in 4 sec at 0.260 amp
Now laptop was completely in Good condition
Thanks to 🙏🙏🙏
💥Rafi Guruji and AFS practical dvds
( Note : all impedance observation for display is without screen )
Hp 15-ac (LA-C701P)
Problem - With in 10-15 mins Laptop shutdown
Clue - Display comes at 0.640 amp
👉 Open and clean the fan and heatink, put new cooling paste and check - but same
👉 Check components for any heat using infrared thermometer, found PL14 (+vcc_core) coil is excessively heating
Little nervous 😟
👉 Start remove components 1 by 1
remove PC78 & PQ13 but same , put PQ13 back
Replace - PCZ42
Display comes at 0.550 amp (amp decreased) But still PL14 was heating
Replace PL14
💥 Heating issue - cleared
Display comes at 0.460 amp and laptop continue on (shutdown problem solved)
Next day morning
Problem no.2 - Laptop Dead
After triggering amp goes 0.077 and come back to 0.008 (ac led glows)
👉 Check all coil impedance, found
PL8 (+5v alw) low impedance &
Pc40 (+3v alw) damaged
CMOS socket also little bit damaged
👉 Replace both standby output capasitor - but +5v impedance same
👉 Remove PJP3 jumper , now jumper's output and input side impedance ok
👉 Problem in jumper solder, so resold it and check.
💥 Board on and Display ok
Problem no. 3
Laptop Hang in both Bios and hdd boot
Start isolation all connection but found problem in motherboard
👉 Add PC118 ( 19v purification which is connected to upper mosfet ) but same
👉 Again replace PL14 & PCZ42 but same
👉 Replace Bios chip and programmed a new file
💥 Hanging issue - cleared
Problem no - 4
Late Display
Before solve this issue, 1st I go for OS installation after OS complete
Open bios chip , cleaned ME using MEinject
💥 Display comes with in 4 sec at 0.260 amp
Now laptop was completely in Good condition
Thanks to 🙏🙏🙏
💥Rafi Guruji and AFS practical dvds
( Note : all impedance observation for display is without screen )
👍1
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Then dont miss to watch this practical live case study repair by SCHEMA GURU
Demo YOUTUBE VIDEO link below..
"THE ART OF TEACHING" in LAPTOP CHIPLEVEL REPAIR
DELL INSPIRON 5520 LA-8241P NOT POWER ON" on YouTube
https://youtu.be/FaUlCiCFw58
AFS SOLUTIONS - Bangalore
Laptop chiplevel Training Institute (advanced level)
ph: +919663011022 , +919881221007
for laptop chiplevel cource study from home..you can purchase video dvd's
Just 25,000/- for total 10 Dvd's...(theory, bios edit, practical case videos)
Then dont miss to watch this practical live case study repair by SCHEMA GURU
Demo YOUTUBE VIDEO link below..
"THE ART OF TEACHING" in LAPTOP CHIPLEVEL REPAIR
DELL INSPIRON 5520 LA-8241P NOT POWER ON" on YouTube
https://youtu.be/FaUlCiCFw58
AFS SOLUTIONS - Bangalore
Laptop chiplevel Training Institute (advanced level)
ph: +919663011022 , +919881221007
for laptop chiplevel cource study from home..you can purchase video dvd's
Just 25,000/- for total 10 Dvd's...(theory, bios edit, practical case videos)
YouTube
LA-8241P NOT POWER ON #ARTOFTEACHING #LAPTOP #CHIPLEVEL #REPAIR DELL INSPIRON 5520
Best laptop chiplevel Training Institute in INDIA 💥 World's FIRST & one of the best, LAPTOP CHIPLEVEL REPAIR DVD'S.💥How to read Schematics, All brands Bios...
👍1