ijust start

My iJust Start (N.B. this is not the same as the iJust S) shows that it's fully charged, but it doesn't fire. It's completely dead, although the light shows that it's charged. I thought perhaps something had come loose so I took it apart and put everything back on again. Any idea of what the...

I have an iJust Start, which I call my "device", but what is the correct term for it? Is it a vaporiser, clearomiser or vape pen? Photo attached.