Chosen Solution
I replaced the power supply on my IMac but I still don’t have any LEDs lit , nor power.
At this point you need to probe the power supply AC input connection with a DVM to see if the power is even getting to the power supply » Just be very careful! « You don’t want to get the shock of your life! So is the power supply getting power? If it is then you need to check the power button connection which is part of the power supply control cable connector. Is the connection good is the cable damaged?
