Open the chassis observed power rectifier diode D801 end sealing off, cause applauded the sound when the phone is switched on, after welding, machine normal, but the compressed edge, measuring its power supply is 22 v, Chad field FR402 resistor (1 Ω / 1 w) metamorphism, replacement, a power supply to 25 v, field scanning is normal, repair.xeEservice manual download site