Lenovo 70LU, Руководство пользователя и руководство по техническому обслуживанию аппаратного обеспечения

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Figure 91. Removing the system board
6. Place the old system board on a clean, flat, and static-protective surface.
7. Note the orientation of the new system board and carefully place it into the chassis. Ensure that the rear
connectors on the system board are inserted into the corresponding holes in the rear panel. Then, align
the eight screws in the system board with those in the chassis, and install the eight screws in the reverse
sequence as you remove them.
8. Pivot the CPU socket cover as shown to remove it from the new system board.
Note: Do not drop anything onto the CPU socket while it is exposed. The socket pins must be kept as
clean as possible.
Figure 92. Removing the CPU socket cover
9. Remove the CPU from the old system board, and install it onto the new system board. See “For service
technician only: replacing the CPU” on page 91.
10. Use a cleaning pad to wipe the thermal grease from the heat sink and the top of the CPU. Dispose of the
cleaning pad after all of the thermal grease is removed.
11. Carefully apply appropriate amount of thermal grease to the top of the CPU in the shape of a cross or a
circle as shown.
Chapter 5
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Replacing hardware
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