factory smoke
Factory smoke is what keeps your devices alive. When you mess it up, you kill it. No more working. Just a dead, broken piece of trash.
My smartwatch died because I hit it with a hammer. It let out a final sigh of factory smoke and died.
I fried my phone with a hairdryer. It was a glorious, fiery death. No more factory smoke.
My tablet died because I used it as a stepstool. It let out all its smoke and quit.