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4 Replacement Procedures 4.21 Fan/CPU
4. Apply new grease on the CPU using a special syringe as shown in the following
figure. Apply quarter of scale (0.25ml) of grease evenly on the CPU chip. When
silicon grease is already applied to the CPU, wipe them off with a close in advance.
CAUTION: When installing the CPU, apply new grease on the top of the CPU chip.
When installing the fin, make sure the bottom of the fin covers the top of the
CPU.
Figure 4-35 Applying new grease
5. Install the CPU heat sink.
6. Place the CPU holder and secure it with the following screws in the order of the
number marked on the holder.
• M2×4B BIND screw ×3
CAUTION: Tighten the screws in the order of mark “1”, “2” and “3” on the CPU
holder.
7. Place the fan and secure it with the following screws.
• M2.5×4B FLAT HEAD screw ×2
8. Connect the fan cable to the connector CN8781 and stick the glass tape.
4-56 [CONFIDENTIAL] PORTÉGÉ M500 Maintenance Manual (960-559)