If the fan is working measure the voltage drop between 1-2 and 1-3 of the CON6 connector. If the voltage is less than 12 VDC between 1-2 replace the board EBR75234705 Pcb Assembly,main
If the voltage is 0 VDC or 5 VDC replace the fan motor. EAU61505013 Motor,dc
View attachment 24744
Besides purchasing an LG refrigerator? Did you test the defrost sensor before you replaced it? Just because you replaced the board it doesn't mean that replacing the sensor for a E dS error will fix it. Is that is the only error you are getting? Measure the resistance between the two orange wires in the connector and the two brown wires in the other connector . Then measure between the two brown wires in CON7 on the board.Is there something I have done wrong....