원문 게시자: Minho ,
I would go [guide|18208|back through this guide] and double check all my steps. The only thing I would do differently from the guide is to disconnect/isolate the battery just before Step 30. To isolate the battery, you will need to buy or make a [product|IF145-304|Battery Isolation Pick]. iPads are much harder to self-repair than phones because there are a lot of things that can go wrong. Torn flexes, damaged LCD's, poor quality digitizers, adhesives... If you did damage the logic board, your device is not lost; you need to find repair shop that does micro-soldering repairs. iPad 4's are still pretty relevant and worth fixing.