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iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides. |
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12-05-2016, 13:39 | #1 (permalink) |
Freak Poster Join Date: Dec 2016
Posts: 117
Member: 2656737 Status: Offline Thanks Meter: 12 | Iphone 6 no service even after replacing all network ICs I have an iphone 6 that shows no sim when there is no sim inside but when you put a sim card into it , it just show searching and no service i tried to replace U_DSM_RF and it worked but one week later came back with the same problem so i tried to reball BB CPU and checked the pads all ok no broken prints i also replaced All network ICs such as: U_WFR_RF, U_WTR_RF, U_PMICRF, U_2GPARF,U_MBPAD, U_ASM_RF,U_HBS_RF, U_LBPAD, U_VLBPAD, U_HBPAD, FT_41BC, FT40A41A, U_QPOET, L4001_RF, L4003_RF, U_BUFFER, but stillnoservicealsowheni try to get *#06# the imei doesn't show up so i guess it's baseband problem but I don't know what else i can replace or wherei have to check?? Any ideas? Thanks |
12-06-2016, 01:13 | #4 (permalink) |
Freak Poster Join Date: Dec 2016
Posts: 117
Member: 2656737 Status: Offline Thanks Meter: 12 | Thank you for you reply I have only replaced the IC's i didn't replace the capacitors,resistors...etc and i have both of imei and modem firmware in settings but when i try to enter *#06# on dial the imei does'nt come up, also i checked baseband voltages i have one voltage missing, on C3208_RF it suppose to be 1.9V but i have 0V i tried to replace BB PMIC but still no volt. |
12-07-2016, 04:43 | #7 (permalink) | |
Insane Poster Join Date: Aug 2016
Posts: 61
Member: 2608533 Status: Offline Thanks Meter: 3 | Quote:
it is indeed baseband sir... try to mild reheat baseband ic if no luck reball or change baseband chips | |
12-07-2016, 18:35 | #9 (permalink) | |
Insane Poster Join Date: Aug 2012
Posts: 82
Member: 1803209 Status: Offline Thanks Meter: 10 | Quote:
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The Following User Says Thank You to ll_r1d0_ll For This Useful Post: |
12-07-2016, 21:12 | #10 (permalink) | |
Freak Poster Join Date: Sep 2014 Location: CN & NZ
Posts: 388
Member: 2252373 Status: Offline Thanks Meter: 400 | Quote:
iPhone6ÎÞ·þÎñάÐÞרÌâÌû - | |
The Following 3 Users Say Thank You to jimchu316 For This Useful Post: |
12-08-2016, 01:09 | #11 (permalink) |
Freak Poster Join Date: Dec 2016
Posts: 117
Member: 2656737 Status: Offline Thanks Meter: 12 | thank you guys for your reply i have checked the links and most of the photos on that site says U1 was broken so i checked the connection between U1 and PP3171_RF U2 and PP3173_RF U5 and PP3172_RF R5 and PP3170_RF i set the multi meter on Beep ( Buzzer) mode and test and it was beeping is that enough or i need to check the resistance too? Thanks |
12-09-2016, 02:11 | #13 (permalink) |
Freak Poster Join Date: Dec 2016
Posts: 117
Member: 2656737 Status: Offline Thanks Meter: 12 | i checked the voltages S1,S2,S3,S4 and all are present so any more ideas please? because i don't know where i have to look i checked and replaced many IC's but still no imei |
12-10-2016, 16:49 | #14 (permalink) |
Insane Poster Join Date: Aug 2012
Posts: 82
Member: 1803209 Status: Offline Thanks Meter: 10 | this is your issue : iPhone6 ÓöÎÞ·þÎñ¹ÊÕÏ£¬Ô*À´ÊÇÕâ¸öÔ*Òò¿ÉÒÔµ¼Ö - |
12-11-2016, 03:48 | #15 (permalink) |
Freak Poster Join Date: Dec 2016
Posts: 117
Member: 2656737 Status: Offline Thanks Meter: 12 | Thank you man for your help but i already checked under BB CPU there is no broken pads. this link you sent me says something about print number U1 under the baseband cpu right? because in the 3rd photo the guy made a jumper on R4609_RF? does it have anything to do with IMEI? thanks |
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