4.6 Heat sink/CPU 4 Replacement Procedures
2. Apply new grease on the CPU using a brush as shown in the following figure. Apply
appropriate quantity (about 0.5 gram minimum) of grease evenly all over the top face
of the CPU chip. When silicon grease is left on to the CPU chip, wipe it off with a
cloth in advance.
CPU
Grease
Brush
Figure 4-9 Applying new grease
3. Install the heat sink.
CAUTION: When installing the heat sink, make sure the bottom of the heat sink covers
the top of the CPU.
4. Place the CPU holder and secure it with the following screws in the order of the
number marked on the holder.
• M2.5×6B FLAT HEAD screw ×3
5. Place the heat sink slot cover and secure it with following screws.
• M2.5×4B FLAT HEAD screw ×2
6. Place the CPU slot cover and secure it with following screws.
• M2.5×4B FLAT HEAD screw ×2
Satellite A40 Maintenance Manual (960-458) 4-19