故障一:开机不显示,仅听到开机的声音,有时开机显示后,按非关机键,自动关机;能正常开机,但拨打一个或几个电话后,电池电量急骤下降,出现低电压告警,手机保护性关机。处理方法:此类故障大多出在手机的“子板”与“母板”P800、J800接口部分。首先打开手机后盖,取下手机“子板”,用毛笔蘸松香水,清洗P800、J800接口的各引脚,再用电吹 Fault 1: the boot does not display, only hear the boot sound, and sometimes boot display, press the non-shutdown key, automatically shut down; able to boot normally, but after dialing one or several phones, the battery power dropped sharply, low voltage alarm, Cell phone protective shutdown. Approach: Most of these failures in the phone’s “daughter board” and “Motherboard” P800, J800 interface section. First open the phone back cover, remove the phone “daughter board”, with a brush dipped in pine fragrance, cleaning P800, J800 interface pins, and then blowing