Fan Cleaning: SONY VAIO PCG-GRV550

• PREPARE THE TOOLS:
  
• KEY POINT: OPEN FROM FRONT, REMOVE THE HIDDEN SCREW
  
• SLIDE THE SOUND PANEL TO RIGHT, DETACH THE SIGNAL STRIP UNDERNEATH.
  
  
• TAKE AWAY THE KEYBOARD, TAKE OFF THE SIGNAL STRIPS
  
• DRAW A MAP OF SCREWS
  
• MANY TEDIOUS STEPS OMITTED, E.G., REMOVE FROM BACK SIDE, BATTERY, HARD-DISK, CD DRIVER, AND REMOVE THE SCREWS AT THE EDGE WHICH CONNECT THE TOUCHPAD SHELL, REMOVE THE LAYER UNDER THE KEYBOARD, WHICH COVERS THE FAN AND MAINBOARD.
• REACH THE LAYER OF FANS
  
• TAKE OFF THE BIG FAN AND REMOVE THE DUST LAYER
  
• CLEAN INSIDE OF THE FAN
  
• THE MAP OF SCREWS FROM BACK SIDE
  

• REASSEMBLE ALL PARTS ACCORDING TO YOUR MEMORY AND SCREW MAP.