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Case study challenge 43/100 📌 Dell n5010 laptop comes in no display issue. 📌 chl with dc supply amp goes to 1.132 but and gives patanjali 7 beep. 📌 problem of graphics section 📌 now start to convert with the help of Respected Rafi sir video. 📌 whole conversion done successfully now assemble laptop and chk display but board gave only external display no internal display. 📌 now chk with only board and screen same issue 📌 chk for any components dry aur not solder properly but not found everything was ok. Try 10k instead of 1m resistor but same, try 2-3 25mhz crystal but again same issue. 📌 after ½ hour I thought about lcd-vdd. Chk that and problem found no lcd-vdd generate 📌 remove 6 leg j-fet and jumper on pin no. 4 to 5 and alhamdulillah. Display was perfect on screen. 📌 Thanks to Respected Rafi sir to teach us how to work with patience. Love you sir 🥰🥰🥰

Case study challenge 42/100 📌 Dell 3521 (la-9104p) laptop comes in no display issue 📌 chk with dc supply amp goes to 0.200 and display. 📌 now chk voltages 3v, 5v, 1.5v all ok 📌 now turn to chk vs voltage. 3v, 5vok but 1.5v missing chk on mosfet 1.5v input ok but no output. No voltage on gate. (B+_bias) 📌Now chk gate track on gate only 1.5v is coming but on this track there b+_bias coming through resistor. On resistor at one end voltage ok but another end only 1.5v. 📌 now I removed mosfet and gate voltage generted properly. Change mosfet and alhamdulillah 1.5vs is generate. 📌 aur ab Rafi sir dua se display aa gaya 📌 Thanks to our schema guru Md. Rafi sir who teach us how to follow power rail. Love you sir lot 🥰🥰🥰

Case Study 01/100 Lenovo Laptop Came for not power on with battery , Working fine with Adopter . Without being asked customer told b4 this issue his laptop was dead n he gave for repair 2 sm othr technician n after service the technician told him that it will work with adopter only n was charged 1500 Took the challenge n approval of rs1000 for the job 2b done The earlier technician alrdy chngd charging ic mosfets etc not interested to trace d same directly As usual following Resp Guruji's lesson keeping things simple n stupid started from battery connector Smdata smclk tmp ok No shorting on batt+ In the 4th minute got the clue as there wasn't any contact btwn btry connector +ve and charging coil Found the culprit in btwn "Fuse" Simply put jumper fuse n confirm case done , after testing put jumper hidden below physical fuse to keep worth n justify job done (sharing pics below) Always AFS DVD n lessons we learn from Resp Rafi Sir Comes into act n gives Result n Success 🙏🙏🙏

Dell n5010 laptop for no display from a card lvl technician , Following my Guru's formula of keeping things simple n stupid Opened laptop disassembled all cosmetics cleaned dimm slot n ram module n connect dc (board + screen only) board triggered n dc amp variation normal n display came , switched off n connected keyboard n repeated the testing process putting each cosmetic 1 by 1 , whn I connected DVD-RW there was no display , found the clue for which it came , if I change or disconnect dvdrw from laptop or its connection the card lvl engineer can easily guess the fault n will not get satisfied , opnd dvdrw n chkd pwr connector , found 5v line short , got the clue n found 1 caps short 2 gnd after taking out 7 components on that line (caps position marked in figure above) put 1 cap from scrap board n rest all components of DVD-RW PCB , put back all things , powrd onn n display came , Thanks Rafi Sir for always keeping us blessed🙏🙏🙏

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EC, IO, KBC Programming and non Programming. ( EC, IO (super IO), KBC have the same name ) ENE/KBxxxx Programming KB9012 Yes KB9016 Yes KB901 Yes KB9022 Yes KB9028 Yes KB9010 Yes KB3930qf/b1 Yes KB926QF No KB3926qf No KB930QP No KB910 No kb3940Q No ITE/ITxxxx Programming IT8226 Yes, 256KB IT8585e Yes IT8586e Yes IT8985e Yes IT8587e Yes IT8522 Yes IT8987e Yes IT8589 Yes IT8522 Yes IT8380E Yes IT8380VG Yes IT8995E Yes IT8886H Yes IT8886he Yes IT8386 Yes IT8586VG Yes IT8518 No IT8517 No IT8572 No IT8528E No SMSC/MECxxxx Programming MEC1609 Yes MEC1404-NU 128-VTQFP Yes MEC1404-SZ 144-WFBGA Yes MEC1406-NU 128-VTQFP Yes, 160KB MEC1406-SZ 144-WFBGA Yes, 160KB MEC1408-NU 128-VTQFP Yes, 192KB MEC1408-SZ 144-WFBGA Yes, 192KB MEC1414-NU 128-VTQFP Yes MEC1414-SZ 144-WFBGA Yes MEC1416-NU 128-VTQFP Yes, 160KB MEC1416-SZ 144-WFBGA Yes 160KB MEC1418-NU 128-VTQFP Yes, 192KB MEC1418-SZ 144-WFBGA Yes, 192KB MEC5085 Yes, 288kb MEC5055 Yes MEC1633L Yes, 192KB SMSC KBC1126-nu No MEC1322-NU No Nuvoton/NPCExxxx Programming NPCE288na0dx Yes NPCE388na0dx Yes NPCE288GA0dx Yes NPCE985PA0dx No NPCE285ua0dx No

KB926QF = C0, C1= D2,D3 · IT8500E = IT8502E = IT8512E · WPCE775 = WPC773 · WPC8763 = WPC8769 · SMSC KBC1098 = SMSC MEC1308 · RT8205A = TPS51125 · ISL6236 = RT8206A = PM6686 · ISL6268 = APW7138 · TPS51117 = RT8209B · TPS51116 = RT8207ISL6227 = APW7108 · TPS51125 = RT8205B = UP6182 · TPS51123 = RT8223M · P2805MF = G5933 · SN608090 = ISL6237 = 51427 RT8206B · ISL6237 = MAX17020 = MAX8778 = TPS51427 = RT8206B · PM6686 = TPS17020 · UP1585QQAG (EM = EC) = TPS51123A = RT8223P ( EQ=XX) · MAX8734A = RT8203 · MAX 8724 = MAX1908 · ISL88731= BQ24745 · ISL 6266 = ISL 6262 · ISL 62883 = ISL 62882 · ALC883 = ALC660 · RT8223 = 51123 · (DH=CH)= (DH=CA)= RT8207 · W8769 = W8763 · SN608090 =ISL6237 = 51427 = RT8206B · · IT8500E = IT8502 = IT8512 · ISL6266 = ISL6262 · ISL62883 = ISL628823 · RT8223 = RT8205 · ITE8502E = ITE8512E · ITE8512EKXS= ITE8512EKXO · ISL6237 = MAX17020 = MAX8778 = TPS51427 = RT8206B · PM6686 = TPS17020 · UP1585QQAG (EM EC) = TPS51123A = RT8223P(EQ=) · ISL88731=BQ24745 · RT8206B = ISL 62373 · MAX8734A = RT82032 · J493 (G966-93) = RT9018B (DELL VASTRO 1015) · KB926QF D3 = KB926QF CO · KB3926QF D3= KB3926QF · RT8205(A) = TPS51125 · (EF = DE 41J) = RT8207LGQW · (CJ=CL 40W) = TPS51125 · KB3310QF-A0 = KB3310QF-B0 Asus All-in-One PC ET1602C · KB3310QF-C1 = KB3310QF-B0 Asus EeePC 900 · KB3926QF-A1 = KB3926QF-A2 Quanta AT3 · KB3926QF-C0 = KB926QF-D3 HP DV5 · KB3926QF-C0 = KB3926QF-D2 Quanta OP6, QT6 · KB3930QF-A2 = KB930QF-A1 Quanta R23 · KB926QF-B1 = KB926QF-C0 Compal LA-3551P · KB926QF-B1 = KB926QF-D3 Compal LA-6552P · KB926QF-D3 = KB926QF-C0 Lenovo G550 - Compal LA-5082P · KB926QF-E0 = KB926QF-C0 Compal LA-6061P · KB926QF-E0 = KB926QF-D3 Compal LA-6311P, Lenovo G555 (LA-5972P) · KB926QF= KB926QF-D2 Compal LA-6421P, LA-6221P · WPCE773 = WPCE775 · WPC8763LDG = WPC8769LDG WistronBiwa, Aspire 5920G - Quanta ZD1 · WPC8769LA0DG = WPC8769LDG Alienware M15x - Quanta MX3 · NPCE781LA0DX = NPCE781BA0DX · NPCE781LA0DX = NPCE783LA0DX Quanta ZQ1 · NPCE795GA0DX = NPCE795LA0DX Quanta ZYG · IT8500E = IT8502E Asus K50IJ · IT8502E = IT8500E Asus K40AB, K40C, K50C, K50AB · IT8502E = IT8512E Asus K50IJ · IT8512E = IT8500E Acer 6920 · IT8511TE-BXS = IT8510TE-GXA Asus X51R/RL · MEC1300-NU = MEC1308-NU Samsung R530 (BREMEN-L3, 1.0,BREMEN-L4, r1.4), Samsung R519 (BONN-L) · TPS 51125A = RT8205BGQW =(CK=CD C47) · RT8209A = FH=CG CU1 · RT8204C = H6=CH JOX · RT8205 = TPS51125 · SN10504 =SN0608098 RHBR · MAX 8724 = MAX1908 ck=cd (check the two first letters "ck") EL= -RT8015A DZ= - rt8113 CZ= - RT8561AGQW D9= -rt9716AGQW C7= -RT9293-20 DJ= - RT8202AGQW DJ- -RT8204PQW DK- - RT8204PQW WQFN3*3-16 JL= - RT8204AGQW WQFN3*3-16 FR= - RT8204BGQW WQFN3*3-16 H6= - RT8204GQW WQFN3*3-16 CJ= - RT8205AGQW CK= - RT8205BGQW CL= - RT8205CGQW CB= - RT8205DGQW DT= - RT8205EGQW EM= - RT8205LGQW = RT8205AGQW EN= - RT8205MGQW = RT8205CGQW CP= - RT8207GQW DH= - RT8207AGQW EF= - RT8207LGQW J7= - RT8207MGQW DS= - RT8223BGQW EP= - RT8223LGQW EQ= - RT8223MGQW FF= - RT8208AGQW FG= - RT8208BGQW H8= - RT8208DGQW 30= - RT8208EGQW 31= - RT8208FGQW FH= - RT8209AGQW A0= - RT8209BGQW A3= - RT8209EGQW JX= - RT8209LGQW A8= - RT8209MGQW K0= - RT8209NGQW _Equivalent RT:_ ISL6236=RT8206A=PM6686 ISL6237=RT8206B ISL6268=APW7138 TPS51117=RT8209B TPS51116=RT8207 ISL6227=APW7108 TPS51125=RT8205B=UP6182 TPS51123=RT8223M ISL6251=G5209 P2805MF=G5933 Found AMD 216-0833000 (HD7670M) can be replaced with 216-0833002 (HD7650M) on Samsung NP350 RT8205LZQW compatible with TPS51125 , working here on Dell Latitude E5530 BQ24747 = BQ24745 = ISL88731C HRTZ - test all OK apw8814 = RT8202A , worked on a asus s400C

db EM= EM=ED EM=CH EM=DC EMdj 8206 RT8206AGQW 8206 RT8206BGQW 8206 RT8206LZQW  8207 RT8207LGQW EF-EF-DE-. EF=CM EF=CG EF=CF EF EF=CM EF=DG EF=DE EF=CG EF=DF 8207 RT8207MZQW j7 em 8208 RT8208BGQW  8209 RT8209BGQW ao=ca AO=BM AO=CD AO=CA AO=BG AO=BG AO=CB AO=BL. AO=BG AO=BH 8223 RT8223MGQW 8223 RT8223PGQW 8239 RT8239BGQW JC=CF,JC=ED,JC=IC,JC=EA,JC.jc=do,jc=ec 8239 RT8239CGQW jd=de jd=ee jd=db jd=dc jd eq=fj JD=DE JD=EE JD=DB JD=DC JD=DG 8243 RT8243AZQW 8A EE 8A EF 8A EC 9297 RT9297GQW EZ=ED EZ=EH EZ=CD Flash KLMAG2GE4A-A001 16G 24003 TI BQ24003 24170 TI PBQ24170 BQ24170 24703 TI BQ24703 24705 TI BQ24705 24707 TI BQ707 BQ24707 24707 TI BQ707A BQ24707A 24715 TI BQ24715 BQ715 XQ24715 XQ715  24721 TI BQ24721 24721 TI BQ24721C 24721C 24725 TI BQ725 BQ24725 24725 TI BQ725A BQ24725A 24726 TI BQ726 BQ24726 24727 TI BQ727 BQ24727 24728 TI BQ728 BQ24728 24735 TI BQ735 BQ24735  24736 TI BQ24736 BQ736 24737 TI BQ737 BQ24737 24738 TI BQ738 BQ24738  24740 TI BQ24740 24741 TI BQ24741 24742 TI BQ24742 24745 TI BQ24745 24747 TI BQ24747 24750 TI BQ24750  24751 TI BQ24751 BQ 24751 24751 TI BQ24751A 24751A  24751 TI BQ24751B 24751B 24753 TI BQ24753A 24753A  24760 TI BQ24760 24762 TI PQ24762 BQ24762 24765 TI BQ24765 51117 TI TPS51117 51124 TI TPS51124 51219 TI TPS51219  51225 TI TPS51225 51621 TI TPS51621 W25Q16BVSIG W25Q32VSIG W25X10AVNIG W25X10BVNIG W25X40BVNIG · G86-631-A2 = G86-621 = G86-620 = G86-630 = G86-603 = G86-920 · G86-920-A2 = G86-921-A2 · GF-GO7200-N-A3 = GF-GO7300T-N-A3 · GF-GO7300-N-A3 = GF-GO7300T-N-A3 · GF-GO7400-N-A3 = GF-GO7400T-N-A3 · QD-NVS-110M-N-A3 = QD-NVS-110MT-N-A3 · G86-740-A2 = G86-741-A2 · GM45 = GL40 · HM55 = HM57 · HM65 = HM67 · 216-8018 = 216-8020 · 216-4026 > 216-4024 > 216-4022 · 216PABGA13F = 216PACGA14F · 216PBCGA15FG = 216PBCGA15F · 216QMAKA14FG = 216RMAKA14FG · 216RMAKA14FG = 216QMAKA14FG · 216MJBKA15FG = 216MJBKA11FG216PNAKA13FG = 216PMAKA12FG · 216PQAKA12FG = 216PQAKA13FG · 216PQAKA13FG = 216PQAKA12FG · 216PMAKA13FG = 216PMAKA12FG · 216PLAKB26FG = 216PLAKB24FG · 216CPIAKA13FL = 216CPIAKA13F · 216BS2BFA22H = 216BS2BFB23H · 216DCP4ALA12FG = 216ECO4ALA13FG · 216MSA4ALA12FG = 216MCA4ALA12FG · 216MPA4AKA21HK = 216MPA4AKA22HK · 216-0674024 = 216-0674026 · 216-0707007 = 216-0707001 · 216-0707001 = 216-0707011 · 216-0707005 = 216-0707009 · 216-0707009 = 216-0707005 216-0707011 = 216-0707001218S4PASA14G = 218S4PASA13G · 218S4EASA31HK = 218S4EASA32HK · 215NSA4ALA12FG = 216MSA4ALA12FG · 216-0772003 = 216-0772000

Richtek RT8206 = Intersil ISL6236 Rt8206b = tps51427 = isl6237 isl6236 = rt8206a = pm6686 = sn0608098 = max8778 max17101 max17020 rt8206 = isl6237 = tps51427a 51123 can be replaced by 51125 :apple: i found that ISL6228 in : Acer Aspire 7750 LA-6911p Acer TravelMate 4730G LA-4221p Acer Aspire 4935 4937 LA-4492p Aspire Aspire 4736 KALG0 LA-4494P bq24725A compatible with BQ24728 BIOS W25Q16B with W25X16 SOIC8 interchangeability chips 32 Mbits (these chips are equivalent and interchangeable) A25L032M-F AMIC AMIC A25L032M-UF MX25L3205DM2 Macronix EN25F32-100H EON W25X32VS WINBOND WINBOND W25Q32VS SST25VF032B SST 16 Mbits (these chips are equivalent and interchangeable) A25L016M-F AMIC AMIC A25L016M-UF MX25L1605DM2 Macronix EN25F16-75H EON EON EN25F16-100H -75H EN25D16 EON EON EN25D16-100H W25X16VS WINBOND WINBOND W25Q16VS SST25VF016B SST 8 Mbits (these chips are equivalent and interchangeable) A25L080M-F AMIC AMIC A25L080M-UF MX25L8005M2 Macronix EN25F80-75H EON EON EN25F80-100H W25X80VS WINBOND F25L008A-50PA ESMT ESMT F25L008A-100Pa SST25VF080B SST 4 Mbits (these chips are equivalent and interchangeable) A25L040M-F AMIC AMIC A25L040M-UF MX25L4005AM2 Macronix EN25F40-75H EON EON EN25F40-100H W25X40VS WINBOND F25L004A-50PA ESMT ESMT F25L004A-100Pa SST25VF040B SST CTLAB parts replace laptop motherboard: 1. RT8205A=TPS51125 2. ISL62366=RT8206A 3. ISL6268=APW7318 4. TPS51117=RT8209B ao=ca AO=BM AO=CD AO=CA AO=BG AO=BG AO=CB AO=BL. AO=BG AO=BH 40. RT8209A=FH=CG CU1 FH=EE,FH=CC,FH=DD,FH=CL,FH=8JFH=CF, 5. TPS51116=RT8207 ISL6227=APW7108 6. TPS51125=RT8205B=UP6182 7. TPS51123=RT8223M=UP1585QQAG(20=el,20=df,20=ef..... ..rt8223p)eq=cg,eq=dm,eq=do,eq=dd=da=dc=dkrt8223m RICHTEK RT8223BGQW RT8223B DS=CC DS=CD DS=CE DS=CF DS=BJ DS=BK 8. P2805MF=G5933 9. SN608090=ISL6237=TPS51427=RT8206B 10. ISL6237=MAX17020=MAX8778=TPS51427=RT8206B 11. PM6686=TPS17020=isl6236=rt8206a 12. U1585QQAG(EM=EC)=51123A=RT8223P(EQ=XX) 13. MAX8734A=RT8203 14. MAX1908=MAX8724 15. ISL88731=BQ24745 16. ISL6266=ISL6262 17. ISL62883=ISL62882 18. ALC660=ALC883 19. RT8223=51123 20. (DH=CH)=(DH=CA)=RT8207 CP=DD,CP=CF,DH=EA,CP=AJ(DH=,CP=)  21. W8769=W8763 22. SN608090=ISL6236=51427=RT8206B 23. KB9206QF C0,D2,D3 ARE INTERCHANGEABLE 24. IT8500E=IT8512=IT8502 25. ISL6262=ISL6266 26. ISL62883=ISL628823 27. RT8205(A)=RT8223 28. RT8206B=ISL62373 29. ITE8512EKXS=ITE8512EKXO 30. MAX8734A=RT82032 31. J493(G966-93)RT9018B(DELL VOSTRO 1015) ES=EF ES=CL ES=DD 32. (EF=DE 41J)=RT8207LGQW EF-EF-DE-. EF=CM EF=CG EF=CF EF EF=CM EF=DG EF=DE EF=CG EF=DF 33. (CJ=CL 40W)=TPS51125 34. PM6686=TPS17020 35. UP1585QQAG(MARKED EC EM)=TPS51123A=RT8223P(MARKED EQ=) RICHTEK RT8223BGQW RT8223B DS=CC DS=CD DS=CE DS=CF DS=BJ DS=BK 36. RT8205(A0=TPS51125% 37. EF=DE 41J---------------RT8207LGQW 38. CJ=CL 40W------------ TPS51125 39. TPS51125A=RT8205BGQW=(CK=CD C47) 40. RT8209A=FH=CG CU1 FH=EE,FH=CC,FH=DD,FH=CL,FH=8JFH=CF, 41. RT8204C H6=CH,H6=CB,H6=CG,H6=BE,H6=CC ETC JOX RT8204BGQW (FR=AH FR=AM FR= 42. RT8205=TPS51125 43. SN10504=SN0608098 RHBR 44. MAX1908=MAX8724 45. ISL6266=ISL6262 46. RT8205=RT8223  order; ncp6131 tps51225 tps51216 tps51219 isl 6228 bq24735 TPS51511 +vddc_gpu PM6652TR +vgfx TPS51621RHAR TPS51218 1.5v. & vtt volt pizi 1189 14 pin TPS51621RHAR 6236 INTERSIL ISL6236IRZ 62392 INTERSIL ISL62392HRTZ  6259 INTERSIL ISL6259AHRTZ 6265 INTERSIL ISL6265AHRTZ 6265 INTERSIL ISL6265CHRTZ  6267 INTERSIL ISL6267HRZ 6269 INTERSIL ISL6269CRZ 6277 INTERSIL ISL6277HRZ 62882 INTERSIL ISL62882HRTZR  88731 INTERSIL ISL88731AHRZ 88731 INTERSIL ISL88731CHRTZ  95831 INTERSIL ISL95831HRTZ  95836 INTERSIL ISL95836HRTZ  98602 INTERSIL ISL98602IRAAZ  1909 MAX1909EVKIT  8725 MAX8725EVKIT 8731 MAX8731AEVKIT 8744 MAX8744E  8770 MAX8770GTL 8771 MAX8771GTL MICREL KSZ8721B ??????? ????? 2136 RTD2136R 269 ALC269 6*6mm 8015 RT8015AGQW 8202 RT8202APQW (dj=ae) 8204 RT8204BGQW (FR=AH FR=AM FR= 8205 RT8205AGQW CJ=BM CJ=BK CJ=BJ CJ=AK CJ=BD 8205 RT8205BGQW Cj=da Cj=bk Cj=ce Cj=al Cj=bm 8205 RT8205CGQW CJ=BM CJ=BK CJ=BJ CJ=AK CJ=BD 8205 RT8205EGQW dt=ca dt=cb dt=cc dt=ch dt 8205 RT8205LGQW EM= EM=ED EM=CH EM=DC EM=

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🍁Today Case Study Hp 🍁Part No. La-D711P 🍁Open Laptop 1st Check phisicaly and corrosion 🍁Nothing Found Connect with DC supply 🍁DC reading is 0.186 means shorting in MB 🍁Check Coil Impidance Found 3volt Coil Impidance Low 🍁First Open Jumper pad (PJ3) 🍁Check Impidance output side ok input side short 🍁Remove Standby ic (PU8) 8A 🍁After remove Impidance ok 🍁Replace 8A Standby ic with new 🍁After replace Connect with DC supply DC showing again short same reading 🍁But 3volt coil Impidance is ok 🍁Check Ic Impidance found VREG3 pin no.15 showing short again remove stand by ic 🍁Inject 1.5 volt on VREG3 pin 🍁io getting heat Remove io Kb9022 Programmable 🍁Now check Impidance pin no.15 showing good 🍁Put back Standby ic in motherboard 🍁Connect with DC supply without io check standby ic VREG3 and VREG5 is ok 🍁Now Replace old io with new fresh io 🍁Now connect with DC supply DC reading 0.001 🍁Check standby after Change io Vreg3 showing 0volt 🍁Again Remove one Jumper pad PJ4 🍁Now check with multimeter Vreg3 volt ok 🍁Remove io and put jumper back (PJ4) 🍁Vreg3 is ok it means my new io is also foulty 🍁Now i put io from scrap board 🍁Connect with DC supply DC reading 0.011😇 🍁Now connect with Programmer and program io 🍁after program triggered mb 🍁MB power on but no display DC reading is 200 🍁Back trace Check dc/dc circuit found U20 Dc ic 🍁Check this ic requirement all ok but 5volt not cross 🍁I don't have this ic remove ic and put jumper for testing purpose 🍁 Triggered mb finaly display come🥰🥰🥰 🍁35 out 100 🍁You have inspired me to go places that I never thought I would ever reach. Now I believe with hard work and dedication everything is possible. Thank you Rafi Sir Love u and God Bless u.