Lenovo 3000 J Series Manual

3.   
 Disconnect all cables attached to the computer. This includes power cords, 
input/output (I/O) cables, and any other cables that are connected to the 
computer. 
4. 
 
 Remove any locking devices such as a padlock that secure the cover. 
5. 
 
 Remove the two screws at the rear of the computer cover and slide the cover to 
the rear. 
 
 
 
Locations 
The following illustration will help you locate the major FRUs in the computer. 
   
 
 

1 Fan plenum, fan, 
and heat sink 

6 Diskette drive 

2...

Identifying parts on the system board 
System board locations are different depending on the machine type. 
Machine Types 7390, 7391, and 7392 
   
 
 

1 Microprocessor fan 
connector 

11 Front panel (power switch/LED) connector 

2 Microprocessor and heat 
sink 

12 S ATA IDE connectors (2) 

3 Memory connector 1 
13 Front USB connectors (2) 

4 Memory connector 2 
14 Serial (COM2 connector) 

5 Clear CMOS/Recovery 
jumper 

15 PCI adapter connectors 

6 Power supply connector 
16 Front...

Machine Types 7396, 7397, and 7398 
   
 
 

1 Microprocessor and heat 
sink 

11 Front USB connectors (2) 

2 Microprocessor fan 
connector 

12 Serial (COM2) connector 

3 Memory connector 1 
13 Front audio connectors 

4 Memory connector 2 
14 PCI adapter connectors (2) 

5 Power connector 
15 PCI Express x1 graphics adapter connector 

6 Diskette drive connector 
16 CMOS battery 

7 IDE connector 
17 PCI Express x16 graphics adapter connector 

8 S ATA IDE connectors (2) 
18 System...

Removing and replacing the drive bay assembly 
Yo u will need to remove the drive bay assembly to access some FRUs. 
1.   
 Remove the computer cover. See “Removing the cover” on page 114. 
2. 
 
 Remove the front bezel by releasing the three tabs and pivoting the top of the 
bezel outward. 
 
 
   
3. 
 
 Remove the two screws at the front of the chassis securing the drive bay 
assembly. 
 
 
 
 
 
118 Lenovo 3000 J Series 

4.   
 Slide the drive bay assembly forward until it stops. Disconnect the power 
supply and signal cables from the drives. Pivot the rear of the drive bay 
assembly upward to remove it completely from the computer.
 
 
 
Note:   To allow easier access to the cables, lift the fan plenum off the heat sink. 
See “Locations” on page 115. 
5. 
 
 Reverse this procedure to replace the drive bay assembly and bezel.
 
 
Chapter 9. Replacing FRUs (Types 7390, 7391, 7392, 7396, 7397, and 7398) 119 

Replacing a memory module 
1.   
 Remove the cover. See “Removing the cover” on page 114. 
2. 
 
 Remove the drive bay assembly. See “Removing and replacing the drive bay 
assembly” on page 118. 
3. 
 
 Locate the memory connectors. See “Identifying parts on the system board” on 
page 116. 
4. 
 
 Open the retaining clips and remove the failing memory module. 
 
 
   
5. 
 
 Make sure the notch 
1 on the new memory module is aligned correctly with 
the connector key 
2 on the socket. Insert the memory...

Replacing a PCI adapter 
1.   
 Remove the computer cover. See “Removing the cover” on page 114. 
2. 
 
 Remove the screw that secures the adapter retainer and remove the retainer. 
 
 
   
3. 
 
 Remove the failing adapter. 
4. 
 
 Remove the new adapter from its static-protective package. 
5. 
 
 Install the new adapter into the appropriate connector on the system board. 
 
 
   
6. 
 
 Reinstall the adapter retainer and screw that secures the retainer. 
7. 
 
 Go to “Completing the FRU replacement” on...

Replacing the CMOS battery 
If the CMOS battery fails, the date, time, and configuration information (including 
passwords) are lost. An error message is displayed when you turn on the 
computer. 
 
 
Important 
Refer to “Safety notices (multi-lingual translations)” on page 7 for information 
about replacing and disposing of the battery.
1.   
 Remove the cover. See “Removing the cover” on page 114. 
2. 
 
 Locate the battery. See “Identifying parts on the system board” on page 116. 
3. 
 
 Depending on...

Replacing the power supply 
 
Attention 
Never remove the cover on a power supply or any part that has the 
following label attached. 
   
 
Hazardous voltage, current, and energy levels are present inside any 
component that has this label attached. There are no servicable parts inside 
these components. 
 1.   
 Remove the cover. See “Removing the cover” on page 114. 
 
2.   
 Remove the drive bay assembly. See “Removing and replacing the drive bay 
assembly” on page 118. 
 
3.   
 Disconnect all power...

10.   
 Position the system board so that the screws holes are aligned and install the 
system board screws. 
11 . 
 
 Install the hard disk drive. Make sure to route the power supply cable for the 
system board underneath the hard disk drive. See “Replacing the hard disk 
drive” on page 140. 
12. 
 
 Reconnect all other power supply cables to the system board and the drives. 
See “Identifying parts on the system board” on page 116. Make sure the cables 
are correctly routed. 
13. 
 
 Replace the drive...