Backlight only no Apple logo or screen after screen replacement

Question

iPad Air 2 LTEモデル

iPad Air 第2世代のセルラーモデル用修理ガイドです。

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krazymusikchik @krazymusikchik

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投稿日: 2018年8月27日

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Backlight only no Apple logo or screen after screen replacement

I just replaced an iPad Air 2 LCD and digitizer but the display is only showing the backlight. I’m getting no Apple logo or any thing showing on the screen. I have also discovered when I push down on the longer LCD cable connected to the logic board I hear Siri chime. I can hear the click when pushing sleep wake but no matter what I do no display. I have tried reseating the cables, a hard reset as well as connecting the old damaged screen (minus the home button) but to no avail no screen.

Update: I should clarify the old damaged screen works but has lines all up and down it. But it does actually display something whereas the new screen shows absolutely nothing.

Has as anyone else experienced this?!

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I should clarify the old broken screen works but just has lines on it. The new screen has nothing

krazymusikchik さんによる2018年8月27日

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Minho @refectio

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投稿日: 2018年8月27日

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Did you isolate the battery before disconnecting and re-connecting the display assembly, as seen here in steps 29-30 of this guide?

Failure to do this exposes the LCD and or backlight circuit to short circuits. This would then be a logic board issue and the usual test would be to plug the original screen back. In this case, both your screens suffer from the same problem so you most likely have a logic board failure. Look around the connectors to see if there is a damaged or burnt component. This will require a micro-soldering repair and is not DIY.

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