Renovated a Skyworth LCD TV 37M11HM power supply three no, remove the boot shell found insurance black. Undoubtedly it is 220V AC or its rectified load severely short circuit. Disassemble the power board (5800-37TTF-0010) visually found resistance R13 and R72 Obviously burned, and then along the circuit to check the PFC power switch K3683 breakdown, no doubt PFC chip FAN7530 certainly no escape damage, remove the FAN7530 meter to measure the peripheral resistance only found the chip resistor R10/331 open circuit, the rest is normal. Replace the damaged The component is turned on, standby 5V is normal, forced to boot PFC voltage 289V also has no 24V and 12V output, and then check the PFC chip working voltage No. 8 pin no voltage, Shun circuit to find ZD5 Zener diode 15V short circuit, change the strong boot test FAN7530 The 8 feet still have no voltage. Follow the optocoupler to find the hot end R31/103 resistor open circuit. Change it again and turn on the PFC voltage 385V output 23.8V 11.89V. Connect the motherboard cable and find the red light flash still does not turn on, measurement The motherboard has no STB boot command, I thought it was really strange, is there a problem with the motherboard? I found an 8M20 and data to write, huh, huh, the program just finished writing the end of the machine, the backlight is on, the signal is fully normal. The data is also shared. Small Servo Drives,Motor Servo Drives,Ac Drive Frequency Converter,Variable Frequency Drive Electric Motor Zhejiang Synmot Electrical Technology Co., Ltd , https://www.synmot-electrical.com Skyworth 37M11HM 5800-A8M201-0000 screen V370B1-L01 25F16 Hu.rar