My Argon sticks at blinking yellow. I tried to enter " Safe Mode" or power off, just not working. I even not sure it is in DFU mode or not as I tried “particle flash --usb hybrid-0.9.0-argon.bin” and it shows no DFU devices.
Could you make a quick video, that might tell us more?
I had something similar to this. Are you using Particle Workbench?
I solved it by building for a different target. i.e. “Compile Application & Device OS” or “Compile Application for debug”. Just create an empty project and compile for a different target. Also try cleaning your project.