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iPhone, iPad, iPod Hardware Repair Hardware Repair discussions for iPhone, iPod , iPad & Apple Products, help, guides. |
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04-08-2014, 23:21 | #1 (permalink) |
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 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 |
04-09-2014, 12:46 | #5 (permalink) |
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. |
04-10-2014, 15:46 | #8 (permalink) |
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 ? |
The Following User Says Thank You to adfd For This Useful Post: |
04-30-2014, 08:28 | #9 (permalink) |
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 ?? |
07-27-2014, 00:31 | #11 (permalink) | |
Junior Member Join Date: Jun 2013
Posts: 23
Member: 1961124 Status: Offline Thanks Meter: 3 | Quote:
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 | |
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