Iphone 3gs screen goes white, after locking ???

my iphone 3gs botts up fine, and everything works, but as soon as i lock it and then try to unlcok it, the screen turns white. tbhis has happened after i have replaced the digitizer and LCD ?? please help, what could the fault be ???

I am not jailbroken, on 5.1.1 (9B206) and have been dealing with this problem since last night. I was using the phone like normal, nothing changed and once I tried to unlock it was white screen. I went to bed and once my alarm in the phone was going off this morning it kept being the white screen and I could not unlock it. After snoozing it somehow from hitting home and the sleep/wake button, the screen randomly came back to life. Now 9 or so hours later, with nothing being updated, added to the phone or changing any sort of way, the white screen when I try to unlock it is back.

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Iphone 3gs screen goes white after unlooking but works fine before

Hi everyone.
This is my first post here.
I got an Iphone 3GS that worked fine yesterday and then suddenly after the unlook the screen the screen goes totlay white.
I have tried the rebot thing and after that the phone works untill it looks the screen and the it back to white again.
I have tried to update the phone software to the latest because the phone looks fine in iTunes. No change
I have done the factory reset no change.
I have even but an old backup to the phone when the phone worked. no change.
What can I do to get my phone working?
thanks in advance

This is a rare but classic iPhone 3GS White Screen Problem. It is due to faulty LCD Display.
Before and during any iPhone 3GS repair make sure the iPhone is OFF. Because the 3GS Logic Board and new LCD is vulnerable to damage when repaired with it being ON.

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The screen isn't broken because it works after i turn the device off and back on, but after it goes black once, it's only white again.
But it takes the touches although it's only white, because I can answer my phone when I slide my finger on the bottom of the screen, eventhough there in not the button to see.
This is so weird. I have already done everything I can think of that might help. But I cannot think of anything that might be causing it, because nothing has happened to the device.

Let me know if I should start a new discussion instead of opening a new topic here.
My wife's iPhone is the same vintage as mine 3Gs, but has never had the battery problem. Its affliction instead is that it cannot detect WiFi networks unless it is quite close to the source. Often, when my iPhone not only detects but shows a maximum cells connection with a network, hers cannot detect the network at all. In contrast, her iPhone seems to detect ourcellular carrier just as well as mine does.
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hi smalley3,
Welcome to the Forums.
The flickering issue maybe due to a bad LCD cable or in some cases, a faulty GPU (the GPU is integrated to the CPU, and the CPU is soldered to the motherboard).
If there's still no image on the screen even after connecting an external display then you likely have a bad GPU.
In this case, I recommend you contact support for service (and also to see if there's a consideration that can be done on the warranty repair).
Support phone list
Regards

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I'm sorry, but this makes no sense. What do you mean by "screenshotting"? How can you tell anything is working if the screen goes blank after you enter the passcode?
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Does anyone know if this can be fixed? If not will i be able to get a replacement. I'd be willing to pay as its out of warranty?
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Remove your case and see how it works. It may be blocking the proximity sensors that turn the screen off/on during a call.
Message was edited by: paulcb

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I know that and it is not the problem nor an explanation.
Here is the issue I am referring to:
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Iphone 3gs screen goes white, after locking ???

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