Why it start by itself?

Question

one night i was in my bed when suddenly i heard sounds from the living room, i went there to check expecting ghosts, just to find my TV and digital receiver are on.

something made it start, what do you think is it?

p.s. universal remote control is not common in my country.

what other signals might open both?, does electricity is responsible? also each the TV and the Receiver has it's own remote.

Answer 1

Sounds ghostly to me.