LCD not lighting after screen replacement!

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第五代 iPod Touch 的

4英寸屏幕；多种颜色可选；共发布三款型号；闪存容量：16、32及64GB

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Apple Tech 752 @appletech752

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发帖于: 2017年4月6日

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LCD not lighting after screen replacement!

Hi,

I bought an iPod touch from eBay without a screen. I separately bought a screen for it and installed it according to professional instructions. I tried to power it up, but no apple logo showed. About 2 min later I pressed the home button and to my surprise siri worked. With a flashlight I noticed the display was working (very dim light) and I could open apps, slide to unlock, etc. However, the display is completely black. I assumed the lcd might not be connected, but even after connecting and reconnecting cables the backlight still doesn't work.

My question is whether this is a screen issue or an iPod hardware issue. The screen and iPod connectors both look perfect in condition.

Any help appreciated!!

Thanks

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Minho @refectio

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发帖于: 2017年4月6日

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Why was this iPod for sale on eBay?

I think you got scammed here...what you explain is a classic backlight circuit problem (logic board). It could be as simple as a defective filter or it could be the entire circuit. The problem with the iPod Touch series is that there are no schematics in the wild, at least none that I have ever found. That means it gets harder to troubleshoot because we can't give you any directions. Of course it could also be a defective replacement screen. You have too many variables here; you need to have some known-good parts in order to troubleshoot.

If the seller never mentioned this problem, and by coincidence he sells it without a screen, I would seek a refund.

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