Lenovo 3000 J Series Manual

Replacing the system board (Types 7396, 7397, and 7398) 
Note:   When replacing the system board, a new retention bracket for the 
microprocessor heat sink is required. Make sure you have a new retention 
bracket before beginning this procedure. 
 
1.   
 Remove the cover. See “Removing the cover” on page 11 4 
 
2.   
 Lift the fan duct off the heat sink fan. 
 
3.   
 Remove any adapter cards installed in the PCI connectors. See “Replacing a 
PCI adapter” on page 121. 
 
4.   
 Remove the drive bay...

11 .   
 Remove the four screws 
1 securing the heat sink and fan assembly to the 
system board. 
 
 
   
12. 
 
 Lift the heat sink and fan assembly off the failing system board. Lay the heat 
sink on its side so that the thermal grease does not come in contact with 
anything. 
13. 
 
 Lift the small handle 
3 and open the retainer 
1. 
 
 
 
 
126 Lenovo 3000 J Series 

Important 
Touch only the sides of the microprocessor. Do not touch the gold 
contacts on the bottom.
14.   
 Lift the microprocessor 
2 straight up and out of the socket. 
 
 
 
Notes:   
a. 
 
 Note the orientation of the notches 
1 on the microprocessor. This is 
important when reinstalling the microprocessor on the new system board. 
 
 
   
b. 
 
 Do not drop anything onto the microprocessor socket while it is exposed. 
The socket pins must be kept as clean as possible.
15.
   
 On the new system...

17.   
 Lower the microprocessor straight down into the system board socket of the 
new system board. 
 
 
   
18. 
 
 Lower the microprocessor retainer. 
19. 
 
 Lock the retainer with the small handle to secure the microprocessor in the 
socket. 
20. 
 
 The new retention bracket has plastic one-way rings on the posts that insert 
into the rear of the new system board. Install the new retention bracket by 
aligning the posts on the module with the holes in the system board and 
pushing the posts...

Replacing the system board (Types 7390, 7391, and 7392) 
 
1.   
 Remove the cover. See “Removing the cover” on page 114. 
 
2.   
 Lift the fan duct off the heat sink fan. 
 
3.   
 Remove any adapter cards installed in the PCI connectors. See “Replacing a 
PCI adapter” on page 121. 
 
4.   
 Remove the drive bay assembly. See “Removing and replacing the drive bay 
assembly” on page 118. 
 
5.   
 Take note of the location of all cable connections on the system board and 
disconnect all cables. See...

14.   
 Lift the small handle 
1. 
 
 
 
 
 
Important 
Touch only the sides of the microprocessor. Do not touch the gold 
contacts on the bottom.
15.   
 Lift the microprocessor 
2 straight up and out of the socket. 
 
 
 
Notes:   
a. 
 
 Your microprocessor and socket might look different than the one 
illustrated. 
b. 
 
 Note the orientation of the microprocessor in the socket. Look for the small 
triangle on one corner of the microprocessor. This is important when 
reinstalling the microprocessor...

16.   
 Holding the microprocessor with your fingers, position the microprocessor so 
that the small triangle
1 on one corner is aligned with the corresponding 
triangle on the socket. 
 
 
   
17. 
 
 Make sure that the small handle is in the raised position. 
18. 
 
 Lower the microprocessor straight down into the system board socket of the 
new system board. 
 
 
   
19. 
 
 Lower and latch the handle to secure the microprocessor in the socket. 
20. 
 
 Install the retention module that was removed...

Replacing the microprocessor (Types 7396, 7397, and 7398) 
Note:   A thermal grease syringe is required to complete the microprocessor 
installation. Make sure the grease syringe is available before beginning the 
procedure. The FRU number for the thermal grease is 91P8835. 
 
1.   
 Remove the cover. See “Removing the cover” on page 114. 
 
2.   
 Lay the computer on the right side to make the system board and 
microprocessor accessible. 
 
3.   
 Disconnect the heat sink and fan assembly cable from the...

6.   
 Lift the small handle 
3 and open the retainer 
1. 
 
 
 
 
 
Important 
Touch only the sides of the microprocessor. Do not touch the gold 
contacts on the bottom.
 7.   
 Lift the microprocessor 
2 straight up and out of the socket. 
 
 
 
 
Chapter 9. Replacing FRUs (Types 7390, 7391, 7392, 7396, 7397, and 7398) 133 

Notes:   
a. 
 
 Note the orientation of the notches 
1 on the microprocessor. This is 
important when reinstalling the microprocessor on the system board. 
 
 
   
b. 
 
 Do not drop anything onto the microprocessor socket while it is exposed. 
The socket pins must be kept as clean as possible.
 8. 
 
 Make sure that the microprocessor retainer is fully open. 
 
9.   
 Holding the microprocessor with your fingers, remove the protective cover 

2 that protects the gold contacts on the new...