I recently found vlog #262 and decided to try and implement it on a 3V battery powered radio tag. However, it's not working. As in, it neither turns on when the battery is inserted, nor when the button is pressed. Since it is all SMD, I'm sure I've just selected some mismatched components. But due to my lack of EE skills (software dev by trade,) I'm not seeing the problem. Most of the components are 0402 because I'm size restricted. That's also why I opted for a dual transistor IC rather than two independent components. I've triple checked the footrprints and am fairly positive they are correct.
The schematic is attached below. Is there something I'm missing? Does this look rational? Is there something I should be doing different for small SMD vs the pull-through components used in the video?
Thanks for ANY assistance, including internet berating as long as it points me in a helpful direction to learn