How to fix iPad touch screen problems
If you have recently replaced the touch screen on your iPad, you may have encountered problems with booting the device. The iPad will fail to boot and get stuck on the Apple boot logo; and the iPad screen will dim and will be unresponsive to any further touch input. This is a commonly observed phenomenon after touch screen replacement. What do you get for the extra money? How about a 9.7-inch "Retina Display" that has a sharper resolution than a 1080p HDTV? How about twice the processor power and more than four times the graphics power? Of course, it needs some horsepower to feed that Retina Display. Overall, the iPad 4 is a much stronger tablet, able to do more heavy lifting. This doesn't mean the iPad Mini is a slouch, but in a pure performance test, the iPad 4 easily wins. If you smart gadget is broken or cracked, how to fix the touch screen properly?
Let us take a look at the cause of this problem and why it typically manifests after the replacement of the iPad touch screen. Issues with touch screens on Apple devices are generally related to the digitizer. A digitizer is an electronic component that converts the user’s touch input into digital signals that can be comprehended and manipulated by the processor of the device. A defective digitizer or an incorrect digitizer installation can cause this particular problem. This is the reason this problem is observed after touch screen replacement, since touch screen replacement involves replacement of the digitizer.
The iPad requires input from the digitizer in order to boot completely. Failure to receive digitizer input renders the iPad unable to boot and it gets stuck at the Apple boot logo.
What can be done to resolve this issue? First of all, it is important to ensure that the digitizer you are using is a genuine OEM product; that is, it has been manufactured by Apple or its affiliates for your specific iPad model. Using cheap or counterfeit digitizers is a sure fire way of causing touch screen problems. If you are already using a genuine digitizer, make sure that it is undamaged and free of defects; particularly the flex cable. If you can see missing gold pins in the connector of the digitizer, it is a sign that the digitizer has been damaged. There is a location on the bottom housing of the iPad for the flex cable; make sure the flex cable securely sits in this area.
The next thing to do is to check whether you have installed the digitizer correctly. It is important to make sure that the circuits to the left of the home button have been correctly covered with kapton tape. On the iPad, left of the home button; there are two areas, one rectangular and one square. These are the areas that need to be covered with tape. The area under the square section requires clear spacer tape. Also ensure that all other gold connectors and surface mounted chips near the home button have been covered with kapton tape. The kapton tape is responsible for absorbing heat and static. The final thing to make sure is to check that all the soldering work involved has been performed properly and all components sit securely. A lot of the work involved in dismantling, assembling, replacing and repairing an iPad is intricate and should not be attempted by individuals without the requisite experience, tools and knowledge of iPad circuitry.
If your iPad is stuck at the Apple boot logo even after trying all of the above steps, consider taking it to third-party retailer for repairing. This touch screen is a replacement front glass digitizer for iPad 4 for cracked / scratched / marked / dead pixel and color issues. Here, I promise our iPad 4 touch screen is made from high-premium materials. Here is a kind notice: we have no IC Flex cable, no Home button. Furthermore, we offer a set of tool for installation and our touch screen is compatible with all iPad 4 models.