iphone 5 display shows shadow arround selectors and has low brightness - GSM-Forum

X10robin · 04-08-2014, 23:21

Iphone 5
dropped and digitizer cracked

new display has low brightness
and shows shadows arround selectors (like flight mode on/off selector)
sometimes i get the vertical stripes

i tried 3 different new screens (black and white)
same problem
So must be hardware/logicboard related

X10robin · 04-08-2014, 23:28

alfyguy · 04-09-2014, 01:11

check connector for the digitizer. Make sure everything is all properly connected.

X10robin · 04-09-2014, 11:37

checked under a microscope.
Connector looks OK

blaiseid · 04-09-2014, 12:46

SWITCH off,unplug all 3 connectors. start with the digitizer connector.make sure this one is fully plugged in. now insert the lcd connector properly then the last one.

blaiseid · 04-09-2014, 13:22

Or change this.
check pic.

X10robin · 04-09-2014, 13:48

Do you mean to replace C154 for a new 1uF cap?
Or remove the Capacitor ?

adfd · 04-10-2014, 15:46

Do you mean to replace C154 for a new 1uF cap?
Or remove the Capacitor ?

X10robin · 04-30-2014, 08:28

Replacing C154 is not the solution

voltage AVDDH and AVDDN are 5.7V and -5.7V
Voltage on C154 is 11.2V

What could be the next step ?
C350, C351, and C353 ??

Deltaone1 · 07-22-2014, 11:01

Have the same problem with my phone, does somebody have a solution for that?

xboxps3 · 07-27-2014, 00:31

Quote:

Originally Posted by deltaone1

have the same problem with my phone, does somebody have a solution for that?

the reason for the fade away with sharp heavy contrast is the short to vccmain and concomittant short to the u15 negative boost supply circuit way; if you short c434 you will see this effect
check for faulty cap in line with the vccmain(3.8-4.3v) there are almost 50 caps to check for vccmain

anytime you have problem with heavy contrast in video, shadow problem with icons and letters, 'ghosting" in video, blurry video inverse color problem, this problem usually with the negative boost circuit ways (also avddn) so you should check and change diode d5, l40, c434, and lastly u15 8 pin bga and whole avddn circuit. If you short lcd_bl_ca to the next pin over on the lcm display connector, avddn(4th pin to the left) or if avddn shorts to gnd, you will damage u15 and this problem happens with messed up dark shadow display

xboxps3 · 07-27-2014, 00:32

Quote:

Originally Posted by X10robin

replace U15 and components around it 100percent fix

04-08-2014, 23:21	#1 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	iphone 5 display shows shadow arround selectors and has low brightness Iphone 5 dropped and digitizer cracked new display has low brightness and shows shadows arround selectors (like flight mode on/off selector) sometimes i get the vertical stripes i tried 3 different new screens (black and white) same problem So must be hardware/logicboard related

04-08-2014, 23:28	#2 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27

04-09-2014, 01:11	#3 (permalink)
alfyguy Freak Poster Join Date: Dec 2010 Posts: 253 Member: 1481974 Status: Offline Thanks Meter: 42	check connector for the digitizer. Make sure everything is all properly connected.

04-09-2014, 11:37	#4 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	checked under a microscope. Connector looks OK

04-09-2014, 12:46	#5 (permalink)
blaiseid No Life Poster Join Date: Aug 2003 Location: Town City Age: 54 Posts: 3,485 Member: 37735 Status: Offline Sonork: 100.103255 Thanks Meter: 205	SWITCH off,unplug all 3 connectors. start with the digitizer connector.make sure this one is fully plugged in. now insert the lcd connector properly then the last one.

04-09-2014, 13:48	#7 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	Do you mean to replace C154 for a new 1uF cap? Or remove the Capacitor ?

04-10-2014, 15:46	#8 (permalink)
adfd No Life Poster Join Date: Jul 2013 Location: Nepal,kathmandu Posts: 981 Member: 1988630 Status: Offline Sonork: 100.1684003 Thanks Meter: 312	Do you mean to replace C154 for a new 1uF cap? Or remove the Capacitor ?

04-30-2014, 08:28	#9 (permalink)
X10robin Freak Poster Join Date: May 2011 Location: Netherlands Posts: 172 Member: 1583294 Status: Offline Thanks Meter: 27	Replacing C154 is not the solution voltage AVDDH and AVDDN are 5.7V and -5.7V Voltage on C154 is 11.2V What could be the next step ? C350, C351, and C353 ??

07-22-2014, 11:01	#10 (permalink)
Deltaone1 Junior Member Join Date: Sep 2011 Posts: 37 Member: 1656561 Status: Offline Thanks Meter: 0	Have the same problem with my phone, does somebody have a solution for that?