DONE !!!!!!!!!!!!!!!!!!!!
the on/off is a combination of 2 pins. I opened the metal case of laptop keyboad, and look for the traces of the on/off button, i follow them they passed from 1 top layer to 1 bottom layer and then to ribbon cable, i tested with a multimeter, and the power flow when i press the button, the multimeter gave me signal. So, now that i now witch pins do the power on/off i can now remove the keyboard and use a on/off switch to power it on. Must now order the Keyrah adaptar.