I have set cold and dark in the aircraft, then i set load default panel on aircraft load but when i load the aircraft again, it still has the battery on and the overhead panel is all illuminated.

What is the correct way to load the 767 in a complete cold and dark situation? Before you ask, my default P3D flight is already cold and dark, with batteries off, avionics off, etc.

Here is the way to do it:

1. Go to the CDU, Options > Options > Page 2
Turn on "LOAD DEFAULT PANEL STATE"

2. Go to Prepar3D v4/Captain_Sim/767-II/Panel
Copy the "COLD AND DARK.cfg" file from the Basic folder into Custom folder. Then rename the file in your custom folder into DEFAULT.cfg

The 767 ( and 757 if you also have it as long as you do it in its own folder) Will now start Cold and Dark everytime.
 

Superb. Thank you and apologies if this is somewhere in the manual and i missed it.

another question.  When loading in Cold and dark can you turn on the flight computer to select a different panel state without turning on the battery etc.  I know other aircraft you can hold a certain button.