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System Board

Dell™ OptiPlex™ 170L User's Guide

  Jumper Settings

  Clearing the CMOS

  Replacing the System Board

CAUTION: Before you begin any of the procedures in this section, follow the safety instructions in the Product Information Guide.

Jumper Settings

NOTICE: Ensure that your computer is turned off and unplugged before you change the jumper settings. Otherwise, damage to your computer or unpredictable results can occur.

NOTICE: Before touching anything inside your computer, ground yourself by touching an unpainted metal surface, such as the metal at the back of the computer. While you work, periodically touch an unpainted metal surface to dissipate any static electricity that could harm internal components.

To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.

Jumper	Setting	Description
CLEAR PASSWORD	(default)	Password features are enabled.
		Password features are disabled.
jumpered   unjumpered

Clearing the CMOS

CAUTION: Before you begin this procedure, follow the safety instructions in the Product Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer.

NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the system board has turned off. To locate the light, see "System Board Components."

1. Follow the procedures in "Before You Begin."
   
   
2. Reset the current CMOS settings:
   
   
   1. Remove the battery for at least 2 minutes.
      
      
   2. Reinstall the battery (see "Battery" for installation steps).
      
      
3. Replace the computer cover.
   
   

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug the cable into the computer.

4. Connect your computer and devices to electrical outlets, and turn them on.
   
   

Replacing the System Board

CAUTION: Before you begin this procedure, follow the safety instructions in the Product Information Guide.

NOTICE: To avoid electrostatic discharge, ground yourself by using a wrist grounding strap or by periodically touching an unpainted metal surface (such as the back panel) on the computer.

NOTICE: Before you disconnect a device from the computer or remove a component from the system board, verify that the standby power light on the system board has turned off.

Small Desktop Computer

1. Follow the procedures in "Before You Begin."
   
   
2. Remove any installed cards.
   
   
3. Disconnect all cables from the system board.
   
   
4. Disconnect the fan power cable from the connector on the system board.
   
   
5. Remove the heat sink/blower assembly.
   
   

CAUTION: The processor heat sink can get hot. To avoid burns, ensure that the heat sink has had sufficient time to cool before you touch it.

6. Remove the processor heat sink.
   
   
7. Remove the screw that secures the system board to the computer frame.
   
   
8. Lift the system board out of the computer.
   
   
9. Place the system board that you just removed next to the replacement system board.
   
   

Visually compare the replacement system board to the existing system board to ensure that you have the correct part.

10. Transfer components from the existing system board to the replacement system board:
    
    
    1. Remove the memory modules and install them on the replacement board.
       
       

CAUTION: The processor can get hot. To avoid burns, ensure that the processor has had sufficient time to cool before you touch it.

2. Remove the processor from the existing system board and transfer the processor to the replacement system board.
   
   
11. Configure the settings of the replacement system board.
    
    

Set the jumpers on the replacement system board so that they are identical to the ones on the existing board.

12. Place the system board inside the computer frame, place the heat-sink base on the system board, and then replace the screw that you removed in step 7.
    
    
13. Reinstall the processor heat sink.
    
    
14. Reinstall the heat sink/blower assembly.
    
    
16. Reattach the cables to the system board.
    
    
17. Reinstall any cards.
    
    
18. Replace the computer cover.
    
    

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug the cable into the computer.

19. Connect your computer and devices to electrical outlets, and turn them on.

Mini-Tower Computer

1. Follow the procedures in "Before You Begin."
   
   
2. If a floppy drive is installed, remove the floppy drive.
   
   
3. Remove any installed cards.
   
   
4. Disconnect all cables from the system board.
   
   
5. Disconnect the fan power cable from the connector on the system board.
   
   
6. Remove the heat sink shroud.
   
   

CAUTION: The processor heat sink can get hot. To avoid burns, ensure that the heat sink has had sufficient time to cool before you touch it.

7. Remove the processor heat sink.
   
   
8. Remove the screws that secure the system board to the computer frame.
   
   

Four of the screws that secure the system board to the computer frame also secure the heat-sink base to the system board.

9. Lift the system board out of the computer.
   
   
10. Place the system board that you just removed next to the replacement system board.
    
    

Visually compare the replacement system board to the existing system board to ensure that you have the correct part.

11. Transfer components from the existing system board to the replacement system board:
    
    
    1. Remove the memory modules and install them on the replacement board.
       
       

CAUTION: The processor can get hot. To avoid burns, ensure that the processor has had sufficient time to cool before you touch it.

2. Remove the processor from the existing system board and transfer the processor to the replacement system board.
   
   
12. Configure the settings of the replacement system board.
    
    

Set the jumpers on the replacement system board so that they are identical to the ones on the existing board.

13. Place the system board inside the computer frame, place the heat-sink base on the system board, and then replace the screws that you removed in step 8.
    
    
14. Reinstall the processor heat sink.
    
    
15. Reinstall the heat sink shroud and lower the shroud over the heat sink.
    
    
16. Reattach the cables to the system board.
    
    
17. Reinstall any cards.
    
    
18. Replace the floppy drive, if used.
    
    
19. Replace the computer cover.
    
    

NOTICE: To connect a network cable, first plug the cable into the network wall jack and then plug the cable into the computer.

20. Connect your computer and devices to electrical outlets, and turn them on.

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