In the dictionaries,
come on:To begin to operate.
- "Set the oven to come on at six."
- "When does the heating come on?"
go on:When a light, the electricity, etc., goes on, it starts to work.
- "Suddenly all the lights went on."
go off:If a light, the electricity, etc. goes off, it stops working.
- "Suddenly the lights went off."
- "The heating goes off at night."
So, can we say:
"The computer went on/off."
"The computer came on/off."
If yes, What are the differences between them?