Hello! this is my first time installing the picofly. In my oppinion everything looks good with the soldering, but after connecting the Nand, and trying to boot, the picofly leds flashed but then I got a blue screen .
Hi,
Those solder joints look cold. Your iron needs more heat, and you need to use more flux.
You need to “tap” those pads. While it should be fine there is also too much solder.
I am not fully convinced that those caps are either damaged or not making a connection.