I am trying to determine what this inductor is. It was already removed from the board when it was brought in for repair, my guess to prevent the AC part of the circuit from operating, The main cap is also blown. The DC part of the board is still functioning. There is a second identical inductor on the board in mint condition. Not sure why this one failed but would like to replace it but not sure where to find....

I'm not sure if this is correct, the output pin 7 is grounded or the ic has a short. I'm just trying to rule it out. https://www.ti.com/product/LM2574?qgpn=lm2574

Thank you for the replies, seems to be fine once I tested it out of circuit.

I tried to locate online without any success but maybe someone else might have better luck. If it is a double diode - it's done - based on the reading I got in diode mode....

Thanks - wish it was that simple. These boards are know to fail due to a disc capacitor cracking, leading the failure of at least one power mosfet which in turn, can cause a failure of the pfc ic. Replacing the shorted mosfet and 4 disc caps, resulted in a nice little mosfet explosion. The next step is to verify that the pfc ic is or is not damaged - that is what I am attempting to do.

I am attempting to test a samsung power supply board to verify the pfc ic is working. I am powering up the board with my isolation transformer. The board turns on fine but when I attempt to connect the ground for the scope probe, it trips out the isolator. I was taught not to 'float my scope' so I am wondering if I should test without connecting the ground lead or would that be asking for trouble? Not sure how else to test, I don't have a portable scope. I could plug direct to mains power but that would bypass the safety factor.