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What to do next:
• To work with another piece of hardware, go to the appropriate section.
• To complete the replacement, go to "Completing the parts replacement" on page 166.
System board
Attention: Do not open your computer or attempt any repair before reading and understanding the Chapter
1 "Read this first: Important safety information" on page 1.
CAUTION:
The heat sink and microprocessor might be very hot. Before you open the computer cover, turn off
the computer and wait several minutes until the computer is cool.
To replace the system board, do the following:
1. Prepare your computer. See "Preparing your computer and removing the computer cover" on page 91.
2. Lay the computer on its side for easier access to the system board.
3. Remove all memory modules and PCIe cards that are currently installed. See "Memory module" on
page 101 and "PCIe card" on page 96.
4. Record the cable routing and cable connections and then disconnect all cables from the system board.
See "Parts on the system board" on page 34.
5. Remove the heat sink and fan assembly. See "Heat sink and fan assembly" on page 142.
6. Remove the eight screws that secure the system board by following the sequence shown in the
following illustration.
Figure 104. Removing the eight screws that secure the system board
146
P320 Hardware Maintenance Manual
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