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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 09-29-2015, 08:18   #1 (permalink)
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Post iPhone 5s: Apple logo and then black screen - after screen replacement


Hello, I have an iPhone 5s that goes to a black/blank screen but first the Apple Logo comes up. I replaced the screen on it, I've done hundreds of screen replacements before without a problem. I'm always careful with electronics since they tend to be very fragile (anti-static wristband and no metal tools). I tried searching up the issue on several other forum with no luck, I figured I could give it a shot to see if anyone else has come across this. The iPhone doesn't go to DFU mode or recovery mode, it simply reboots back to Apple and then to black/blank screen. I tried forcing it to DFU mode with RecBoot as well without a luck. I'm assuming it's a board issue but wanted to know if anyone knew what I would need to replace. I'm comfortable doing SMD and good with a soldering gun. The display comes on fine, it's not faded or lacking brightness so I doubt that it's the LCD capacitor but I really don't know. Hopefully someone can help with this very weird problem. Thank you for your time!

-If anyone has a link for a application like recboot that works, that would be appreciate as well, Thanks again!
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Old 09-29-2015, 08:22   #2 (permalink)
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https://www.youtube.com/watch?v=qEZEfykrM7o


chk this
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Old 09-29-2015, 08:43   #3 (permalink)
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bro that goes to a black/blank screen after apple logo not blue screen
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Old 09-30-2015, 09:09   #4 (permalink)
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Sounds suspiciously like a power problem, Check battery connection and change battery.
Also try different dock flex.
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Old 10-01-2015, 06:41   #5 (permalink)
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I have the same problm. Customer brought to me like this. First white apple logo black screen and then only black screen. I can see backlight is on from the orher side of screen. I changed u2, replaced batt Connector. The right screw hole is also a bit damaged i removed it the lines r a bit blank but not cut. I gonna change display pmu next and inform u.
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Old 10-01-2015, 21:52   #6 (permalink)
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same here
any1 have the selution so plzzz give us
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Old 10-02-2015, 08:49   #7 (permalink)
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i had the same problem and it was the PMIC

New U7 338S1216 A2 IC for iPhone 5S Power Management IC 338S1216 | eBay

check all capasitors from pmic
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Old 10-02-2015, 09:17   #8 (permalink)
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anyone have tested solution ......................................????????
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Old 10-02-2015, 19:34   #9 (permalink)
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Change U2, I had same issue, it was U2. If you already changed before, try to change again.
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Old 10-03-2015, 04:37   #10 (permalink)
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After change u2 your problam solve or not ?

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Old 10-04-2015, 09:01   #11 (permalink)
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I had similar problem. Changed U2 solved for me.
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Old 10-06-2015, 11:31   #12 (permalink)
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Bro solve my problem after change promaxy strip..


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Old 10-06-2015, 16:01   #13 (permalink)
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i think its a flash ic problem i faced that problem one day
try to write a new firmware from iTunes if its back to dfu again try to change flash ic carefully
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Old 10-11-2015, 18:42   #14 (permalink)
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My problem is solved changed usb ic and mobile is ok now.....

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Old 10-11-2015, 18:44   #15 (permalink)
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usually this problem caused by EMMC problem .. unfortunately i got two customer dropped phones haven't fixed
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