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Go Back   GSM-Forum > GSM & CDMA Phones / Tablets Software & Hardware Area > iPhone ,iPod & iPad (Apple Inc. Products) > iPhone, iPad, iPod Hardware Repair

iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides.

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Old 09-15-2017, 00:49   #1 (permalink)
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iPhone 6 Plus Searching No IMEI No Modem Firmware


Originally water damaged and boot looping.

Speaker amp ic reballed and shorted cap removed.

Phone boots now but searching and no modem firmware/IMEI when dial *#06#

Things tried:
Replaced BB_pmu
Reballed BB CPU

Same issue. No shorts anywhere on baseband side

Any suggestions?
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Old 09-16-2017, 03:39   #2 (permalink)
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Check VREG_L13_PP_LDO13

U_PMICRF
C3401_RF

U_BB_RF
C3420_RF
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Old 09-16-2017, 03:54   #3 (permalink)
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Quote:
Originally Posted by peak_mobile View Post
Check VREG_L13_PP_LDO13

U_PMICRF
C3401_RF

U_BB_RF
C3420_RF


All voltages from U_PMICRF come up for a second then drop to 0v and try to come up again and keeps repeating then stops.

No shorts measured anywhere
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Old 12-03-2017, 06:07   #4 (permalink)
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Quote:
Originally Posted by peak_mobile View Post
Check VREG_L13_PP_LDO13

U_PMICRF
C3401_RF

U_BB_RF
C3420_RF
same with me no voltage on these caps i change pm8019 but still same no short ???
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Old 12-05-2017, 20:03   #5 (permalink)
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reballing basebande bro
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