I'm thinking its the little guy I've circled here in red (under the protective black tape). I don't think the replacement flex connections are as exact as Apple. This part circled holds the corner up from sitting perfectly flat. I've seen this in a few phones now.
I've successfully bent the corner of the metal plate on the back side of the flex cable with a set of stiff tweezers but you could damage the connection or cause it to sit worse.
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[image|387767|align=left]
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UPDATE
After getting a couple "white line" replacement screens to work correctly in other phones, I've concluded you must be very careful with the way you fold the flex cables, make it just like the original. if its got too much curve and not enough of a fold it can make the lcd go wonky. I originally tested the screens without fitting them in the frame and they worked but once i fitted them into the frame i got the white lines. i wasn't paying close enough attention to the folds.
hope this helps someone
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UPDATE #2
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So I've had this problem again a couple times, and just in last hour now as well. This last one, I quickly realized the connection wasn't seated properly (which by the way, it is EXTREMLY EASY to seat the lcd flex off to the side and not centred), after connecting hundreds of flex cables, the iPhone 5C is the only one I've had issues with seating correctly. Anyway, even after correctly seating the flex, when I powered the iPhone back on, the lines and other graphics were still burned into the screen, and the backlight was rapidly flashing. I started to swear. Then I just left iPhone to charge up to 100% and the burned in graphics have faded away, and it works correctly!
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Lesson learned here: if you realize you made a mistake with the flex, correct your error, then give the phone some time to correct itself, don't freak out right away. I also gave it a couple hard reboots, that's when I noticed the burned graphics starting to fade.
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again, I hope this helps someone, White iPhone 5Cs are the devil ;)
I'm thinking its the little guy I've circled here in red (under the protective black tape). I don't think the replacement flex connections are as exact as Apple. This part circled holds the corner up from sitting perfectly flat. I've seen this in a few phones now.
-
I've successfully bent the corner of the metal plate on the back side of the flex cable with a set of stiff tweezers but you could damage the connection or cause it to sit worse.
+
I've successfully bent the corner of the metal plate on the back side of the flex cable with a set of stiff tweezers but you could damage the connection or cause it to sit worse.
+
[image|387767|align=left]
-
[image|387767|align=left]
+
+
UPDATE
After getting a couple "white line" replacement screens to work correctly in other phones, I've concluded you must be very careful with the way you fold the flex cables, make it just like the original. if its got too much curve and not enough of a fold it can make the lcd go wonky. I originally tested the screens without fitting them in the frame and they worked but once i fitted them into the frame i got the white lines. i wasn't paying close enough attention to the folds.
I'm thinking its the little guy I've circled here in red (under the protective black tape). I don't think the replacement flex connections are as exact as Apple. This part circled holds the corner up from sitting perfectly flat. I've seen this in a few phones now.
-
I've successfully bent the corner of the metal plate on the back side of the flex cable with a set of stiff tweezers but you could damage the connection. Also, I think having the metal plate that holds down the flex cables installed helps prevent a bad connection.
+
I've successfully bent the corner of the metal plate on the back side of the flex cable with a set of stiff tweezers but you could damage the connection or cause it to sit worse.
[image|387767|align=left]
+
+
UPDATE
+
+
After getting a couple "white line" replacement screens to work correctly in other phones, I've concluded you must be very careful with the way you fold the flex cables, make it just like the original. if its got too much curve and not enough of a fold it can make the lcd go wonky. I originally tested the screens without fitting them in the frame and they worked but once i fitted them into the frame i got the white lines. i wasn't paying close enough attention to the folds.
I'm thinking its the little guy I've circled here in red (under the protective black tape). I don't think the replacement flex connections are as exact as Apple. This part circled holds the corner up from sitting perfectly flat. I've seen this in a few phones now.
I've successfully bent the corner of the metal plate on the back side of the flex cable with a set of stiff tweezers but you could damage the connection. Also, I think having the metal plate that holds down the flex cables installed helps prevent a bad connection.
[image|387767|align=left]