First suspect software problems, to waveguide in the local factory customer service center for free after rewriting software, still cannot be ruled out. Plus power supply, power measurement points are normal, almost no longer panic. Suspect power supply problem, installed after the first battery-powered test machine, but is still off the battery power supply power supply, panic is no longer present. Tweezers pluck the four gold-plated battery contacts on the phone, there is no other phone that hard, are extremely flexible handle. Resize the contact pad height, battery testing, fault is no longer present. But this is only temporary, four soft contacts only handling a battery section falls short again, presumably assembling and disassembling the battery multiple times, combined with the thin design, but narrow copper strip. Elasticity decreases causing the battery with the contacts of long non-answer, and CPU work disorders, often erratic crashes. Difficult to buy original accessories, emergency repairs after the four contacts to increase height, then glue a small piece of hard objects underneath it against contacts with its compression will not sink to the touch to slot below. After this treatment, the battery test machine, crashes do not occur.Gqqservice manual download site