Laptop Internal Components


Figure 1-36 shows the inside of a laptop case after the cover on the bottom of the laptop has been removed. Here is a list of important components, most of which you can see in the photo:



  • Battery pack. The battery pack is not shown because you always remove the battery first before opening a laptop case.
  • Hard drive. The 2.5-inch hard drive is secured in its bay with two screws. When you remove the screws, you can use the plastic tab to lift the drive from its bay.
  • CPU, heat sink, and fan. The CPU is hidden under the heat sink, which is labeled in the Figure. The heat sink draws heat from the CPU and pipes it to the fan, also labeled in the figure. The fan blows the heat out of the laptop case.




  • Memory. Laptops use smaller memory modules than the DIMMs used in desktop computers. In the figure, you can see two SO-DIMMs (small outline DIMMs) installed. Figure 1-37 shows a DIMM and a SO-DIMM for size comparison.
  • Wireless card. The wireless card is installed to the left of the hard drive in Figure 1-36. You can see two wires leading to the wireless antennas, which are installed in the laptop lid.
  • System board. Look for the blue system board (in laptop documentation, the motherboard is usually called the system board) under the heat sink, memory, and fan. If you look carefully, you can see microchips and other components on the board.
  • Optical drive. The optical drive is not visible in the photo. To replace it, you first remove a single screw holding the drive in place and then slide the drive to the left and out of the case. This one screw is labeled in Figure 1-36.
  • Other hardware components you are likely to find in a laptop case include a small speaker and smart card reader and writer. In the chapter, “Working Inside Desktop Computers and Laptops,” you learn how to disassemble and reassemble a laptop.




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