Status LED flashing blue?

[dreamER]

Welcome to the community
If your Argon is blinking dark blue try this:

Argon always returns to listening mode

Hi, try this: [setup_done_DFU] This is regarding to Boron but instruction shows option for Argon as well. Make sure that you are using a good quality USB cable (the best is the Particle OEM). I’m not sure how to “bite” the issue with entering to DFU mode but maybe this (always work for me) will work

Hope will help