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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 01-21-2017, 01:25   #1 (permalink)
HUM
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iphone 6 blinking on apple logo


iphone 6 when charger connected
it show apple logo and logo disappear

this continuously happen
but when remove charger set off
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Old 01-21-2017, 04:46   #2 (permalink)
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Why no one likes to give history? Water? Drop? what have you tried already??

Did you try to power on with powersupply? maybe you have faulty battery.

Connecting any iphone/ipad/ipod to charge with battery disconnected, you will have apple logo come and go.

So maybe bad battery.
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Old 01-22-2017, 01:26   #3 (permalink)
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history of this phone

when customer gave me this phone with blank lcd (but it give light)

set look like water damage but some other technician already clean pcb

so i try with new lcd but same
chk lcd tracks but all are fine

change display ic but no success

finally replace u2 ic and power on the phone but no response

insert charger it show apple logo and disappear

after replace battery it fully power on and also show charging but only when set is in on condition

in off conndition no response

suddenly again lcd gone

iits connfusing
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Old 01-22-2017, 04:12   #4 (permalink)
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Quote:
Originally Posted by HUM View Post
history of this phone

when customer gave me this phone with blank lcd (but it give light)

set look like water damage but some other technician already clean pcb

so i try with new lcd but same
chk lcd tracks but all are fine

change display ic but no success

finally replace u2 ic and power on the phone but no response

insert charger it show apple logo and disappear

after replace battery it fully power on and also show charging but only when set is in on condition

in off conndition no response

suddenly again lcd gone

iits connfusing
When you say LCD gone, you mean just no display? is the phone still on (e.g. can vibrate or make sound)?

IF you lost backlight than I believe you have 2 problems.

Charging issue
Backlight issue
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Old 01-22-2017, 04:16   #5 (permalink)
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When you say LCD gone, you mean just no display? is the phone still on (e.g. can vibrate or make sound)?

IF you lost backlight than I believe you have 2 problems.

Charging issue
Backlight issue


Sent from my iPhone using Tapatalk Pro
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Old 01-22-2017, 04:31   #6 (permalink)
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backlight is ok
but no graphics
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Old 01-22-2017, 04:53   #7 (permalink)
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Something is wrong with the forum!

Anyway, test voltage at the 3 caps:



If voltages are missing or low change U1501 & L1519



This is for no display
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Old 01-22-2017, 05:28   #8 (permalink)
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already replaced u1501 but same
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Old 01-22-2017, 21:58   #9 (permalink)
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any solution and suggestions....?
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Old 01-23-2017, 03:29   #10 (permalink)
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any solution and suggestions....?


Did you change l1519? Did you test voltages?


Sent from my iPhone using Tapatalk Pro
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Old 01-23-2017, 23:51   #11 (permalink)
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i notice that when put pressure on ic which is just below sim jack than it gives display .....but stuck on apple logo

release pressure from this ic not give display
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Old 01-24-2017, 03:03   #12 (permalink)
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any idea if all these things

lcd/ display ic/ display connecter/ display ways are ok

than what other ic is responsible for this problem ?
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Old 01-24-2017, 07:37   #13 (permalink)
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check connecter battery if not connecting
or try to change battery maby battery is no good
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Old 01-24-2017, 09:11   #14 (permalink)
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Quote:
Originally Posted by HUM View Post
i notice that when put pressure on ic which is just below sim jack than it gives display .....but stuck on apple logo

release pressure from this ic not give display
BB CPU? Give me name of ic from schematic or atleast picture
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Old 01-24-2017, 15:45   #15 (permalink)
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the ic just below sim jack when put pressure it show lcd
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