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Jumpers and Connectors

Dell™ PowerEdge™ 2900 Systems Hardware Owner's Manual

  System Board Jumpers

  System Board Connectors

  SAS Backplane Connectors

  Disabling a Forgotten Password

This section provides specific information about the system jumpers and describes the connectors on the various boards in the system.

System Board Jumpers

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

Figure 6-1 shows the location of the configuration jumpers on the system board. Table 6-1 lists the jumper settings.

NOTE: To access the jumpers, remove the center fans and the center fan bracket. See Removing and Installing a Fan and Removing the Center Fan Bracket.

Figure 6-1. System Board Jumpers

Table 6-1. System Board Jumper Settings 

System Board Connectors

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

See Figure 6-2 and Table 6-2 for the location and description of the system board connectors.

Figure 6-2. System Board Connectors

Table 6-2. System Board Connectors 

SAS Backplane Connectors

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

See Figure 6-3 for the location and description of the connectors on the back of the 1x8 SAS backplane board. See Figure 6-4 for the location and description of the connectors on the back of the optional 1x2 SAS backplane board.

Figure 6-3. 1x8 SAS Backplane Connectors

1	SAS_A connector	2	SAS_B connector	3	power connector (BKPLN)
4	diskette drive power connector (FDD)	5	retention pin	6	optical drive/tape backup unit connector (CD/TBU)
7	power connector for 1x2 backplane (FLEX)

Figure 6-4. 1x2 SAS Backplane Connectors

1

power connector

2

SAS_B_IN connector

3

SAS_B_OUT connector

Disabling a Forgotten Password

The password jumper on the system board enables the system password features or disables them and clears any password(s) currently in use.

CAUTION: Only trained service technicians are authorized to remove the system cover and access any of the components inside the system. See your Product Information Guide for complete information about safety precautions, working inside the computer, and protecting against electrostatic discharge.

1. Turn off the system and attached peripherals, and disconnect the system from the electrical outlet.
   
   
2. Remove the bezel, if attached. See Removing the Bezel.
   
   
3. Open the system. See Opening the System.
   
   
4. Note the cable connections on the SAS daughter card, and then disconnect the cables from the storage daughter card and extend the cables away from the center fan bracket.
   
   
5. Remove the fans from the center fan bracket. See Removing and Installing a Fan.
   
   
6. Remove the center fan bracket. See Removing the Center Fan Bracket.
   
   
7. Remove the password jumper plug.
   
   

See Figure 6-1 to locate the password jumper on the system board.

8. Replace the center fan bracket (see Replacing the Center Fan Bracket) and replace the fans in the bracket.
   
   
9. Reconnect the storage daughter card cables.
   
   
10. Close the system. See Closing the System.
    
    
11. Reconnect the system to the electrical outlet, and turn on the system.
    
    

The existing passwords are not disabled (erased) until the system boots with the password jumper plug removed. However, before you assign a new system and/or setup password, you must install the jumper plug.

NOTE: If you assign a new system and/or setup password with the jumper plug still removed, the system disables the new password(s) the next time it boots.

12. Turn off the system, including any attached peripherals, and disconnect the system from the electrical outlet.
    
    
13. Open the system.
    
    
14. Repeat step 4 through step 6.
    
    
15. Reinstall the password jumper plug in its original position to enable the password protection feature.
    
    
16. Replace the center fan bracket and fans and reconnect the storage daughter card cables.
    
    
17. Close the system, reconnect the system to the electrical outlet, and turn on the system.
    
    
18. Assign a new system and/or setup password.
    
    

To assign a new password using the System Setup program, see Using the System Password.

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