Toshiba Satellite A40 Maintenance Manual - Page 240

4 Replacement Procedures 4.6 Heat sink/CPU 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. Brush Grease CPU 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 4-22 Satellite A40 Maintenance Manual (960-458)