Turn on Sony bravia

In command list is just PowerOff to turn off and TvPower to switch state of power, but there is not PowerOn.
I would like have buttons to turn on TV and switch chanell together. TvPover Num1 works only when TV is switch off. After turning on this command turn off TV.
Another problem is, that Num1 switch chanel to last used. I cannot switch chanel to specific one when I turn on TV or switch from application.