One, the Apple phone black screen can be summed up a few cases:
The first is that the iphone itself is a refurbished machine or any other quality problem, and occasionally an unstable black screen, but not a damaged screen.
The second, in an accidental factor into Apple's DFU model, is Apple's recovery model.
The third possibility is that the Apple system will not boot.
The hardware is damaged and the screen is broken.
In addition to the 4th really need to go to Apple repair point to repair, the rest are software problems, you can solve their own.
Second, the solution to the Apple phone black screen method:
First of all, solve the first case, the iphone itself is unstable, resulting in a black screen. This black screen can be attributed to the unstable automatic shutdown, because the quality of the machine is not good, resulting in no reason shutdown. Because the hardware does not really have a big problem, so directly press and hold the Power-on key and so on its boot can.
Again, the second scenario is described. The DFU mode is a mode in which the Apple system fails to boot, and the recovery mode can be recovered using itunes. But your mobile phone is not a problem, mistakenly entered the DFU mode as a result of the inability to open is thought to be a mobile phone failure, in fact, very good solution.
Only need to hold down the power button and the home button and so on your iphone has a response on the line, generally 10 seconds, if it is a few 10 seconds have no response, do not persist, look at the following method!
The above is because of the DFU mode, and if the third situation, you need to enter the DFU mode, how to enter it? First, itunes is installed on your computer, and you can download a new iOS system. or restore files that have been backed up beforehand. Of course, the computer can be networked during the recovery process, and can also download online, waiting for a long time.
Then the black screen of the mobile phone with a USB cable to connect the computer, while holding down the power-on key and the home button for 10 seconds (preferably a more accurate grip) and then release the power button in the tenth second (don't be mistaken) hold down the home key. It doesn't matter if the screen has a connection icon or a black screen. itunes will be able to respond to the recognition of the machine.
Then press the SHIFT key on the keyboard, choose to use itunes to restore your phone, and then after the recovery is completed, the boot should be able to solve. The ipod and ipad also apply to this method.
Okay, the above methods are all related to the problem of the iphone black screen, of course, if it still can't be solved we can send the phone to the sale later to help you solve the oh, if not full 1 years may also be able to change a new Apple phone.