Anybody know how to test a power AC/EMI filter failure?
Diagnosis LED #1 keeps blinking after I had replaced the Power Supply (PSU)
No chime, no fan activity, no “Electric buzz” on surface, like total dead iMac.
I wonder how do I check the Ground of the AC inlet EMI filter, before I buy a new motherboard.
I checked with multimeter the AC inlet EMI filter cables that suppose to connect to the MB and I see voltage, that mean the positive/live line pass through the AC inlet EMI filter but I don’t know how to check the ground line…
Because from the AC inlet come out a Green cable that is attached to the external surface, and I can’t feel anymore the electric buzz when I touch when it was working normal, always feel like a little buzz.
Could the ground line malfunction cause the LED 1 blinking and do not start at all?
Could be the EMI filter AC inlet be the reason?
I would be happy to find any suggestion before I decide to do something