@bmcdermott that is reference designator L3500 which is a PIM B062D-SM series 1.5UH 20% 12.5A 0.017OHM inductor. The series is hard to match but the inductor is available at places [https://www.digikey.com/en/products/filter/fixed-inductors/71?s=N4IgjCBcoMxaBjKAzAhgGwM4FMA0IB7KAbXAE4AGCkAXXwAcAXKEAZUYCcBLAOwHMQAX3wA2MvBBJIaLHkIkQAFgpkYq2g2aQ2nXgOEgATBQAcAdglSZOfEUikwAOgCsAAgCtACQ0gmLAKo8XIwA8sgAstiomACuHNhC%2BMYmJpYoGDby9uCGLq4Agj5%2B2oHBYZHRcQmCNUA|like this] Even so the series is different, it will still fit the solder pads. If unsure of that download the datasheet for the inductor from the site I linked to and it will have the dimension for the solder pads on there. Does not look like it is related to your fan issue at all but it is part of the TBT 5V regulator circuit.