Sure! Let’s start by checking a few things. First, make sure the AC power source is functional and properly connected to the SK-PS6. Also, check if the power switch on the unit is turned on. If both are okay, inspect the wiring connections to ensure they are secure and properly terminated. Additionally, check if there are any blown fuses or tripped circuit breakers. If all of these check out fine and the problem persists, it might be a fault within the power supply unit itself, and it may need to be replaced or serviced by a qualified technician. Let us know if you need further assistance!