Keyboard #1
• Whenever the beginning cutscene ends, turn around and head over to the wardorbe and open it:
  
• There you'll find the first keyboard.

Keyboard #2
• In the pools level go up the two sets of stairs and head to the left in to one of the hallways:
  
• Go in the room with pillars and the keyboard should be on your right:
  
• There you'll see the keyboard (note: I have already gotten the keyboard before the picture was taken)
  
  
  Keyboard #3
• Wherever you find yourself in the area with multiple hallways, go in the first one on your left:
  
• You'll find the keyboard just behind the corner:
  
• (note: I have already gotten the keyboard before the picture was taken)
  
  
  Keyboard #4
• After you get to the big open pool area, go through the first opening on your right:
  
• There go up the left sets of stairs on the balcony:
  
• Now go to the far right corner:
  
• And there it is in all of it's glory...
  
  
  Keyboard #5
• In the room with the puzzle in the middle, go to the far right corner of the room:
  
• There should be a keyboard at the second wall:
  
• (note: I have already gotten the keyboard before the picture was taken)

Keyboard #6
• At the start, walk through the door and head left:
  
• Behind the ramp and the pillar should be the keyboard:
  Better picture of the surroundings:
  
  
  Keyboard #7
• The last keyboard is in one of the corners of the second level the garage has:
  
• (I once again already had the keyboard in this image)

This is my first manual ever, so I hope it was somewhat helpful. If there are any mistakes or unclear informations, please make a comment regarding it. Bye and have a nice day.