My Toshiba HD TV turns on by itself any ideas on why
Your TV may be in Sleep Time mode, which is causing all the issue. If the Sleep mode is not the problem, then your TV could be having some power issue. The TVs internal power switch could be faulty so you should consult a specialist.
Maybe it's set by motion. My Sony will go into motion mode if no movement has happened for a certain amount of time. ( turn off by it self)