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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 12-30-2018, 19:10   #1 (permalink)
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iphone 7 no modem hardware after audio ic


hi
i just recived an iphone 7 the intel version that some one fixed the audio ic and after that the iphone is with no modem hardware i reballed the baseband ic and change bb pm still no modem hardware any idea?
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Old 01-01-2019, 11:49   #2 (permalink)
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Maybe bb power ic, try to reball it!
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Old 01-01-2019, 18:15   #3 (permalink)
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as i wrote i reballed the baseband and changed the bb power ic and it still not working the modem hardware is empty
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Old 01-01-2019, 20:36   #4 (permalink)
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Try restore from DFU, if the iTunes logo error ends in BB IC
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Old 01-02-2019, 14:09   #5 (permalink)
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Can you measure short on of cap near bb pmic?
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Old 01-08-2019, 14:10   #6 (permalink)
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no shorts on caps near bb pmic
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Old 01-08-2019, 14:13   #7 (permalink)
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check the shortage on the coils near baseband ic.
if there is .. let us know
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Old 01-08-2019, 15:40   #8 (permalink)
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Power on the board and check the voltages of the 4 coils near the baseband.

I think they're PP_VSW1,2,3 and 3.
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Old 01-09-2019, 15:33   #9 (permalink)
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Quote:
Originally Posted by comcell View Post
hi
i just recived an iphone 7 the intel version that some one fixed the audio ic and after that the iphone is with no modem hardware i reballed the baseband ic and change bb pm still no modem hardware any idea?
You have to try again with proper temp, clear pads, and good stencil.
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Old 01-09-2019, 19:43   #10 (permalink)
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reball or change u3601
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Old 01-09-2019, 20:29   #11 (permalink)
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have u solution?
I have same problem. Everything looks ok, but no imei ;-(
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Old 01-10-2019, 21:11   #12 (permalink)
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i did it twice and its not my first time fixing this problem on many iphones
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Old 01-11-2019, 01:54   #13 (permalink)
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I have posted in another thread. I did one by repalcing the main PMU:
iPhone 7 only recognize serial number
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Old 01-11-2019, 05:59   #14 (permalink)
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Why we need 10 post to
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