But can't open the machine after shutdown, and background light is on. xqYservice manual download site
 xqYservice manual download site
The machine breakdown is not like virtual welding, because after startup, cell phone (no automatic shut-down) everything is all right. Then open the machine to repair the power supply, press the power button, the phone is not turned on (current is about 60 ma, the background lights), the multimeter measuring motherboard U307, U406 end feet are normal voltage of 3.0 v, have taken place again at the same time (CPU, register, clock circuit, code) after repair welding again, measured again u846 5 feet of the power supply voltage of 1.5 v, and unstable. This module is for the CPU reset power supply IC, the normal voltage should be 2.7 V. So the machine does not start up is due to bastardize U846 performance (powered on, the CPU is not reset voltage. Phone no initialization). After replacing U846 cellphone all normal.xqYservice manual download site