I'm at Sector C and need the code for the door with the numpad. I read some walkthroughs and it said that I should read the blank note, I have it.. but can't read it. It says that i's empty and nothing on it.. Nothing happens when I double click it.. And when I look on the "To do list" it also says that i's empty kinda..
its been a long time since i played, but i tought you needed to be in the UV Light room with the uv ligth on and then read the note
Oh, aha! It must be so! Is that the room where you turn on the lights and see writings on the walls? The room with a big hole and a cabinet on the ground? Hmm, now I must find it too. But thanks. I'll try it!