Lenovo B560 DEAD

[Dhirendra Gaur]

Make/Model-Lenovo B560
Motherboard Part No-LA56
Processor Type-i3 1st generation
Ram Type –DDR3
I/O –NUVOTON NPCE781EA0DX
STEPDOWN- BD9528
CHIPSET-BD82HM55
Problem –DEAD
Diagnosis-EC BIOS CHIP FAULTY
Process-
Found laptop Lenovo B560 dead condition open and found motherboard (LA56) part no then checkout voltage 19+VE is ok Charging voltage is ok and not coming step-down voltage (+3.3vand +5.1V) switch Voltage is coming 3.3.v CMOS battery Voltage (3.3V)is not coming check voltage bios pin voltage(Main Bios Not voltage any pin/EC Bios pin 1,7,8,-3.3v and not voltage other pin ) after pressing switch button not power on motherboard and not generating step-down voltage , reprogram ec bios but not program bios chip after change ec bios chip program successfully after programed EC bios placed motherboard and connected power motherboard automatic on and all voltage is coming proper, motherboard working fine …