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Fourth generation iPhone. Repair is straightforward, but the front glass and LCD must be replaced as a unit. GSM / 8, 16, or 32 GB capacity / Model A1332 / Black and White. This page aims to help users troubleshoot, fix, and seek help for the iPhone 4.

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iPhone 4 display failure after few minutes of replacement

i had display with many random color. i cannot see anything on my iphone 4 screen go i decided to replace the screen. i go to store and purchased a display and digitizer. i tested with the new display in shop by placing the two strips directly on the logic board. i tested the i phone it works fine touch was working properly. i purchased and came home. i assembled the display on i phone frame and switched on the old problem come again. how ever the new display and touch worked in shop. i dont know whether my logic board was fault or any random problem with my display. i checked with two displays same problem. the screen work for few minutes after that the random colors occupied the screen.. please solve this .

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U should confirm the screen is properly connected to the board and u may inspect the board for damages (liquid, or displaced IC)

Update (11/17/2015)

Wen u take out the motherboard, u shld check if any of the components on the board are still properly soldered. Sometimes in the process of replacement have seen some iPhone 4s board with loose capacitor, so u may Check it up

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thanks sir for your response. i checked the lcd properly connected to board. the board is not damaged with liquid. but i dont know anythign about displaced ic . can you please tell me how to check for displaced ic'?

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