3A*** SY8388C3RHC - N/D (Wistron SouthPeak13 ADL-P)
A0S*** SY8210AQVC - N/D (LA-D993P)
AA*** SY8008AAAC - P/T SOT23-5, TSOT23-5
AAJ*** SY6288AFAC
AAL*** SY6288BFAC
AAM*** SY6288CFAC
AAN*** SY6288DFAC
AB*** SY8008BAAC
ABD*** SY6288BCAC
ABE*** SY6288DCAC
ABT*** SY6288ACAC
ABU*** SY6288CCAC
ABV*** SY6288EFAC
ABW*** SY6288ECAC
AC*** SY8008CAAC
ACJ*** SY6288D1FAC
ACK*** SY6288D1CAC
AD*** SY8009AAAC
ADK*** SY6288C1CAC - P/T MSOP8
ADL*** SY6288C2CAC - P/T MSOP8
AE*** SY8065ABC - N/D (Pegatron VA70) P/T SOT23-6
AEH*** SY6288D2CAC - P/T MSOP8
AEX*** SY6288C4CAC - P/T MSOP8
AHV*** SY6288D10CAC - N/D (LA-B211P)
AJY** SY8213
Ar*** SYX196C1QNC - N/D (NM-A381)
ARW*** SY6288C30CAC - P/T MSOP8
AS*** SY8009BEBC
AWF*** SY6982E
AWR*** SY8286ARAC
AWS*** SY8288RAC - N/D (LA-C371P)
AWV*** SY8286BRAC - N/D (LA-C371P)
AWW*** SY8286CRAC - N/D (LA-C371P)
AZD*** SY6288C5CAC - P/T MSOP8
AZE*** SY6288D5CAC - P/T MSOP8
B0D*** SYV828CRAC - N/D (LA-F401P)
BAA*** SY8286RAC - (LA-F486P)
BAB*** SY8288BRAC - N/D (LA-F611P)
BAC*** SY8288CRAC - N/D (Quanta ZHP ZSP)
BC*** SY8310RAC - N/D (NM-C421) (LA-J261P - N/S)
BDJ*** SY8288ARAC - N/D (HuaQin NB2593)
BG*** SY8008BACC
BI*** SY8008AACC
BID*** SY8284RAC - N/D (LA-G021P)
BIE*** SY8284BRAC - (LA-G07FP)
BIL*** SY8284CRAC - N/D (Vellfire-6050a3087503-mb-a01)
BP*** SY8033BDBC - N/D (LA-6222P)
Bq*** SY6288D30AAC - P/T SOT23-5
BQX*** SY8180CRAC - N/D (LA-F611P)
Br*** SY6288C30AAC - P/T SOT23-5
BTX*** SY8270CTMC - N/D (LA-H492P)
Bu*** SY6288DAAC
CO*** SY6280 - P/T SOT23-5
CO*** SY6288EAAC - P/T SOT23-5
CU*** SY8009BABC
CW*** SY6288AAAC
DB*** SY6288BAAC
DF*** SY6288CAAC
DS*** SY6288D1AAC
EC*** SY8063DBC
EI*** SY6827
EN*** SY8201ABC - P/T SOT23-6
Fd*** SY6288A1AAC - P/T SOT23-5
FK*** SY8032ABC - N/D (LA-B102P)
FN*** SY76875DBI - N/D N/I
FP*** SY6288C3AAC - P/T SOT23-5
Gg*** SY8057QDC - N/D (LA-E153P)
GN*** SY8809DFC - N/D (LA-8712P) P/T DFN-8 2X2
GP*** SY8037ADCC - N/D (LA-8711P) P/T DFN12P
GT*** SY8037BDCC - N/D (LA-8391P)
HA*** SY8036LDBC - N/D (LA-8241P)
HC*** SY6288C6AAC - N/D (Wistron Husk Petra -4M)
HI*** SY8037DDCC - N/D (LA-8941P)
HU*** SYW232DFC - N/D (Wistron EA30_BM) P/T DFN-8 2X2
JD*** SY8003DFC
JR*** SY8104ADC
JX*** SY8089AAC - (NM-A311P)
Kd*** SY8386RHC - (LA-H101P)
Km*** SY6288E1AAC - (NH70RCQ_6-71-NH500-D02A)
KT*** SY8868QMC - N/D (NM-A271) P/T QFN-10
KW*** SY8003ADFC
LD*** SY8088AAC
mH*** SY8057CQDC - N/D (Wistron SouthPeak13 ADL-P)
MS*** SY8208BQNC - N/D (LA-9535P + Read post #6 https://www.badcaps.net/forum/showthread.php?t=75034)
MT*** SY8208CQNC - N/D (LA-9535P)
MU*** SY8208DQNC - N/D (LA-A091P + Read posts 11 and 12 https://badcaps.net/forum/showthread.php?t=50800)
ND*** SY8206BQNC - N/D (NM-A281)
Ne*** SY6288E2AAC - P/T SOT23-5
NE*** SY8206CQNC - N/D (LA-A021P ?)
NF*** SY8206DQNC - N/D (LA-A021P)
PE*** SYV634DEC - N/D (NM-C421)
Qq*** SY8386BRHC - N/D (EL432 EL532 LA-H131P)
QW*** SY6280A - P/T SOT23-5
RE*** SY6288D20AAC - (LA-C371P)
RF*** SYX198BQNC - N/D (NM-A561)
RG*** SYX198CQNC - N/D (NM-A561)
RH*** SYX198DQNC - N/D (LA-E311P)
RI*** SYX196BQNC - N/D (LA-A994P)
RJ*** SYX196CQNC - N/D (LA-C282P)
RK*** SYX196DQNC - N/D (LA-D071P)
rM*** SY8388CRHC - N/D (NM-D031)
RT*** SY6288C20AAC - (LA-C371P)
Te*** SY6861B1ABC - (LA-G021P)
VC*** SY8003EDFC
Vt*** SY8843QWC - N/D (SF314-57 NB8511 MB)
Wm*** SY8057BQDC - N/D N/S
yQ*** SY8388BRHC - N/D N/S
YU*** SY8201CABC - P/T SOT23-6
YW*** SY8368QNC - P/T QFN3x3-10

usefull link .. everyone must be save this link

🙏I am on leave from 22th to 31st October on account of Dipawali and Chhath Puja.

🙏Unable to reply on Phone calls and Telegram/Whatsapp calls/Message during this period.

🙏Unable to accept any sales and repair order during this period
🙏 Thanks

NOTICE: WE ARE NOT RESPONSIBLE FOR ANY TYPE OF SALES ACTIVITY USING " LCIIT EX-STUDENT " TERM BY ANY OTHER MOBILE NUMBER EXCEPT THEN OUR OFFICIAL NUMBER +91 8010708080.
LCIIT NEW DELHI OFFICIAL WHATSAPP+TELEGRAM NUMBER : +91 8010708080

हमारे ऑफिसियल मोबाइल नंबर +91 8010708080 के अलावा अन्य किसी दूसरे मोबाइल नंबर द्वारा " LCIIT EX-STUDENT " टर्म का उपयोग करके की जाने वाली किसी भी सेल्स एक्टिविटी के लिए हम जिम्मेद्दार नहीं है.

What not to do

Never reflow large BGA
It won't fix the problem since 99% of the time; it’s not a contact issue between the BGA and the logic board. There's a high risk of damaging the board even further.
If you want to confirm if an AMD/NVidia chip is bad, you can heat it up to 200°C max for a minute and a half, with no flux. It'll come back to life for a short while and then die again because it's bad. In this case, it has to be replaced.

Don't suspect that something is shorted for no reason
Shorted components are not the only failure mode of a laptop. Additionally, some places will measure low resistance to ground under normal operation. Generally, high power low, voltage (<2V) power rails will measure less than a few hundred ohms to the ground. CPU VCore will measure a few ohms only. GPU VCore with newer NVidia GPU can even measure less than 1 ohm. It's normal. If you suspect a short-to-ground, always report your exact resistance to ground measurements.

Never randomly inject voltage
Voltage injection is used to find a short to ground. Only consider it after you find that there is a short to the ground and after doing a visual inspection trying to find a broken component.

Never inject 19V
If the 19V main power rail is missing, there's a reason, often because protection kicked in to avoid more damage. For example, the 19V power rail could be shorted to the CPU through a bad high-side MOSFET. In that case, the charging circuit protection kicks in and turns off the DC-in MOSFET. Luckily, the CPU didn't take too much of a hit yet. If you inject 19V, you are sure to destroy it. Always measure exact resistance to ground to see if there is a possibility of high-side MOSFET short. Always start at 1V and check if any of the large BGA (CPU/GPU/PCH) is warming up. Monitor the power consumption.

Never randomly replace components
If you don't follow a proper troubleshooting process, randomly replacing components will rarely solve the problem, and it can create additional issues.

Never randomly bridge MOSFETs/fuse/components
Bridging components can easily lead to the destruction of the board without any way to repair it.
If it's a fuse, replace it with a matching fuse. If you don't, it will not be able to protect the board, and if the source of the problem is still there, some other component will go up in flames.
If it's a MOSFET, its purpose is to stop current from flowing through it when turned off and allow current to flow through it when turned on. It's not necessarily always turned on; otherwise, it wouldn't be there. If it's turned off when it shouldn't, then there is an issue elsewhere in the circuit. Bridging the MOSFET won't solve it.

Don't apply power to the board with missing components
As a general rule, if a component is on the board, it's because it's useful for something. Engineers don't like adding a bunch of useless components on the board; it’s harder to draw the schematics and route on the PCB.
Some of them can be removed without creating problems if power is applied, but others can kill the board with no possibility of repair.
For example, if you remove a buck controller or a MOSFET driver, the MOSFET gates will float. They'll charge up enough so that the MOSFET turns on. Of course, you don't want the 19V from the main power rail to go straight through the CPU VCore MOSFET to the CPU.

Article by Piernov

🙏LA-G521P, DEALER BOARD FROM ANDHRA
🙏PROBLEM: NOT POWERING ON, VIN ENTRY PROBLEM. NIL VOLTAGE ON CLR
🙏OBSERVATION: NIL GATE BIASING VOLTAGE FOR ACFET N RBFET. ISSUE IN DCIN PATH RESISTOR OF CHARGING IC
🙏STEPS: FIX FAULTY RESISTOR BUT STILL NO GATE VOLTAGE
🙏STEPS: REMOVE SECOND MOSFET ( RBFET). NOW 18 VOLT AVAILABLE ON ACFET GATE. HERE SHOULD BE 24-25VOLT
🙏OBSERVATION: NIL LDO VOLTAGE ON CHARGING IC
🙏STEPS: REPLACE ISL88739 CHARGING IC
🙏NOW EVERYTHING PERFECT. CASE DONE

🙏ACDRIVE/ASGATE MISSING. THIS IS THE TOP MOST COMMON PROBLEM OF LAPTOP MOTHERBOARD SINCE 4TH GENERATION TO TILL. EVERY LAPTOP REPAIRER MUST KNOW STEP BY STEP SOLUTION OF THIS PROBLEM.

CASE STUDY:
PROBLEM: lenovo ideapad 3-15ITL05 unable to install windows(showing error ) and no display after some days .

TROUBLE SHOOTING: IN MOTHERBOARD (onboard ram) all voltages are available tried with bios update but same problem

SOLUTION: i discussed with subodh sir ji and shared my old bios , subodh sir ji shared onboard ram disabled bios and after programming the new bios problem solved .

many many thanks to subodh sir ji

CASE STUDY DONE BY satyendra sharma

🙏I am on leave from 22th to 31st October on account of Dipawali and Chhath Puja.

🙏Unable to reply on Phone calls and Telegram/Whatsapp calls/Message during this period.

🙏Unable to accept any sales and repair order during this period.

🙏 All Offline Training/Class will be closed during this period.

🙏 Thanks

Join "Lciit"
Download Now: http://on-app.in/app/home/app/home?orgCode=bmbby

https://bmbby.courses.store/

Join "Lciit"
Download Now: http://on-app.in/app/home/app/home?orgCode=bmbby

https://bmbby.courses.store/

ENIT BIOS DOCTOR—-COMING SOON