Toshiba Satellite L450 L450d Pro Maintanance Manual

							Error! Style not defined. Error! Style not defined.   4 Replacement Procedures  
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4.15 CPU and Thermal Module 
Removing CPU and Thermal Module 
Remove the CPU and the CPU thermal module according to the following procedures and Figure 
4.25, 4.26. 
CAUTION:   
When removing the thermal module, keep the following in mind: 
1.  The thermal module can become very hot during operation. Be sure to let \
it cool down 
before starting the repair work. 
2.  If you remove the CPU thermal module, please use soft cloth with alcohol\
 to clean the 
CPU and CPU thermal module. Reapply Shinetsu 7762 grease before installi\
ng the 
CPU thermal module. If you use one new CPU thermal module, please make s\
ure 
remove the release paper first. 
 
1. Remove four spring screws securing the thermal module to the motherboard, according to 
the number sequence sealed on the thermal module. 
2.  Remove the thermal module from the motherboard.  
						

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24 1 3
 
Figure 4.25 Removing the Thermal Module spring screws 
 
CAUTION:   
When removing the CPU, keep the following in mind: 
The CPU can become very hot during operation. Be sure to let it cool dow\
n before starting 
repair work. 
 
3. Unlock the CPU by rotating the cam on the CPU socket counterclockwise to the unlock 
position with a flat-blade screwdriver. 
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Figure 4.26 Removing the CPU 
4.  Remove the CPU. 
 
Installing CPU and Thermal Module 
Install the CPU and Thermal Module according to the following procedures.  1. Check the cam is in the unlock position.  
2.  Seat the CPU on the socket, using care not to damage the pins. Align the CPU with the 
CPU socket by using the triangle as a guide. 
3.  Rotate the cam clockwise to the lock position with a flat-blade screwdriver. 
CAUTION:  
When installing the thermal module, keep the following in mind: 
1.  Be sure to confirm the correct position for the module. 
2. Secure the relevant screws on the motherboard according to the number se\
quence 
sealed on the thermal module. 
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4. Reapply Shinetsu 7762 grease on the CPU thermal module as shown in Figure 4.27. If 
you use one new CPU thermal module, remove the release papers on the thermal pads 
first. 
 
Thermal pad 
Thermal pad Thermal Grease 
Figure 4.27 Reapply the Shinetsu 7726 grease on the thermal module and r\
emove the release  papers 
5.  Install the thermal m

odule into the correct position in the laptop. 
6.  Secure it with four spring screws according to the number sequence sealed on the thermal 
module. 
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4.16 Display Assembly 
Removing the Display Assembly 
CAUTION:  Use care to avoid the antenna cable being caught between the display as\
sembly 
and the laptop. 
Remove the display assembly according to the following procedures and Figure 4.28, 4.29. 
1. Turn the laptop so the rear is facing you and remove two M2.5x4.5 screws. 
 
 
M2.5×4*2 
Figure 4.28 Removing the screws from the rear of the laptop   
2.  Remove three M2.5x4 and one M2.5x5 screws securing the display assembly to the 
laptop. 
  M2.5×4*3 
 
M2.5×5*1 
Figure 4.29 Removing the display assembly 
3.  Remove the display assembly. 
 
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Installing the Display Assembly 
Install the display assembly according to the following procedures. 
1. Place the display assembly in the correct position. 
2.  Secure the display assembly with three M2.5x4 screws and one M2.5x5 screw. 
3.  Close the display panel and turn the laptop so the rear is facing you an\
d secure two 
M2.5x4.5 screws.  
						

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4.17 LCD Bezel Assembly 
Removing the LCD Bezel Assembly  
Remove the LCD bezel assembly according to the following procedures.  
1. Remove four rubber seals from the LCD bezel assembly.  
2.  Remove two M2.5x5 and two M2.5x6 screws as shown in Figure 4.30. 
  M2.5×6*2 
 
M2.5×5*2 
Figure 4.30 Removing the LCD Bezel Assembly 
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3. Peel off the bezel from left and right side as shown in Figure 4.31. 
 
Figure 4.31 Peel off the bezel 
4.  Push the bezel from the left and right side as shown in Figure 4.32 and remove the bezel 
from the display assembly. 
 
Figure 4.32 Remove the bezel 
 
Installing the Display Mask 
Install the LCD bezel assembly according to the following procedures.  
1. Seat the LCD bezel assembly in the correct position.  
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2. Press the bezel downside hook as shown in Figure 4.33. 
 
Figure 4.33 Press the bezel downside hook 
3.  Press the left and right side of the bezel as shown in Figure 4.34. 
 
Figure 4.34 Press the left and right side of the bezel 
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4. Press the bezel upside hooks as shown in Figure 4.35. 
 
Figure 4.35 Press the bezel upside hooks 
5.  Secure it to the display assembly with two M2.5x5 and two M2.5x6 screws. 
6.  Put four rubber seals over the screw holes. 
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