Help Argon has gone offline and won't come back?

I have been working with web IDE and downloading code now Argon refuses to update the flash. My LED is flashing a slow heartbeat (blue and red)…I’ve tried all I know but can’t get it back.
It says “Device not discoverable or offline”

What can I do??? I have tried reconnecting to wifi and i’ve also tried using a local flash but it just sits and spins…

I solved it by holding down reset and mode, releasing reset then releasing mode.

You can read about the different LED modes here: Status LED and Device Modes - Electron | Tutorials | Particle

It gives an easy way to diagnose what ‘state’ the device is in.