About this manual. 1 Important Safety Information. 1 POST error codes. Undetermined problems. 20 20 Chapter 2. Safety information. 3 General safety. Electrical safety. Safety inspection guide. Handling electrostatic discharge-sensitive devices. Grounding requirements. Safety notices. 3 3 5 5 6 6 Chapter 7. Locations. Identifying internal components. Identifying parts on the system board. 21 21 21 Chapter 8. Replacing hardware. General information. Replacing the keyboard and mouse Removing the computer cover. Removing the front bezel. Replacing a memory module. Replacing a hard disk drive. Replacing an optical drive. Replacing a graphics card. Replacing the TV-Tuner card. Replacing the Power supply. Replacing the microprocessor fan. Replacing the heat-sink. Replacing the CPU. Replacing the Wi-Fi card. Replacing the motherboard. FRU lists. 25 25 26 26 27 28 29 30 31 33 35 35 36 37 39 40 41 Chapter 3. General information. 9 Specifications. 9 Chapter 4. General Checkout. Chapter 5. Using the Setup Utility...