Received the phone press the power button, the screen no response, then ask the customer how to cause

(customer said the machine in normal use flower screen, and then shut down, to open and then open up)

The teardown detection, remove the mainboard ammeter test, there is a current, short answer the motherboard boot, there is also a current rise, feeling the mainboard has been switched on

So bad idea again, ask the customer and have data, no data buffer has a try,

After customers allow flash 9.3.5 system test, a brush, then boot set to white apple

Then brush 10.0.2 system, this time not, an error 2009

Obviously, 2009 error is hard drives or hard drive power supply problems

Replace the disk, brush brush 10.0.2 system again, the process of error 14

Error 14 can also quickly find the problem, is a computer software problem, the iTunes to upgrade the latest version

Flash 10.0.2 system again, OK, once again tested repeatedly 9.3.5 system is also a brush.

The machine fault is hard solder loss caused, and finally listen to customers often fall off cell phones, since seems to be true