When setting up the Nano dev kit yesterday I was surprised to find not one of the various 5v power supplies I have with 5.5mm x 2.1mm plug would fit the center pin on the nano. It appears to have a 5.5mm x 2.5mm barrel jack. All literature from NVDA and elsewhere claims it should be 5.5mm x 2.1. The dev kit has a S/N with mfg date of 23-2019. Perhaps the BOM changed? Curious if anyone else ran into this.
I appreciate the input and embarrassed to say the problem was between chair and keyboard. I measured with calipers the Nano and two power supplies from another project. Both supplies turned out to be slightly smaller than 2.1mm which was the reason they didn’t fit. I have a correct 5v 4A version ordered and in the meantime using a lab power supply. I hadn’t paid attention to the variations other than 2.5mm and 2.1mm and didn’t realize there are quite a few others.