This section describes the inside of your computer as a reference for you to use before you perform an upgrade procedure. Before you remove the computer cover, see "Safety First—For You and Your Computer" and "Removing and Replacing the Computer Cover."
Figure 1, Figure 2, and Figure 3, and Figure 4 show a side view of the small-form-factor, low-profile, midsize, and mini tower chassis, respectively, to help you orient yourself when you work inside the computer.
Figure 1. Small-Form-Factor Chassis Orientation View
 |
|
Figure 2. Low-Profile Chassis Orientation View
 |
|
Figure 3. Midsize Chassis Orientation View
 |
|
Figure 4. Mini Tower Chassis Orientation View
 |
|
Figure 5, Figure 6, Figure 7, and Figure 8 show the small-form-factor, low-profile, midsize, and mini tower chassis, respectively, with the cover removed.
Figure 5. Inside the Small-Form-Factor Chassis
 |
|
Figure 6. Inside the Low-Profile Chassis
 |
|
Figure 7. Inside the Midsize Chassis
 |
|
Figure 8. Inside the Mini Tower Chassis
 |
|
Figure 9 shows the system board and the location of all its sockets and connectors.
Figure 9. System Board Components
 |
|
Figure 10 shows the layout of jumpers on the system board. Table 1 lists the system board jumpers and their settings.
Figure 10. System Board Jumpers
|
Jumpers are small blocks on a circuit board with two or more pins emerging from them. Plastic plugs containing a wire fit down over the pins. The wire connects the pins and creates a circuit.
To change a jumper setting, pull the plug off its pin(s) and carefully fit it down onto the pin(s) indicated.
NOTICE: Make sure your system is turned off and unplugged before you change a jumper setting. Otherwise, damage to your system or unpredictable results may occur.
Table 1. System-Board Jumper Settings
| Jumper | Setting | Description |
|---|---|---|
| PSWD |  (default)
|
System password
features are enabled. System password features are disabled. |
jumpered  unjumpered |
||
Table 2 lists the labels for light-emitting diode (LED) indicators, connectors, and sockets on the system board, and it gives a brief description of their functions.
Table 2. System Board Indicators, Connectors, and Sockets
| Connector or Socket | Description |
|---|---|
| AUX_LED | Auxiliary power indicator |
| B1 | Battery socket |
| DIMM_x | Dual in-line memory module (DIMM) socket |
| DSKT | Diskette/tape drive interface connector |
| ENET | Integrated network interface controller(NIC) connector |
| FAN | Microprocessor fan connector |
| IDEn | EIDE interface connector |
| INTRUSION | Chassis intrusion switch connector |
| KYBD | Keyboard connector |
| MICROPROCESSOR | Microprocessor connector |
| MONITOR | Video connector |
| MOUSE | Mouse connector |
| PANEL | Control panel connector |
| PARALLEL | Parallel port connector; sometimes referred to as LPT1 |
| POWER_1 | Main power input connector |
| POWER_2 | 3.3-volt (V) power input connector |
| RISER | Riser board connector |
| SERIALn | Serial port connectors |
| USB | Universal Serial Bus (USB) connectors |
To access some components on the system board, you may have to rotate the midsize or mini tower chassis system power supply out of the way. To rotate the power supply, perform the following steps.
 |
CAUTION: Before you remove the computer cover, see "Safety First—For You and Your Computer." |
Figure 11. Rotating the Power Supply
 |
|
To access some drive bays in the mini tower chassis, you must first remove the front bezel. To remove the front bezel, perform the following steps.
|
CAUTION: Before you remove the computer cover, see "Safety First—For You and Your Computer." |
Figure 12. Removing the Mini Tower Chassis Front Bezel
 |
|
To replace the bezel, fit the two retaining hooks on the bezel into their corresponding slots at the bottom of the mini tower chassis. Then rotate the bezel toward the chassis until the tabs snap into their corresponding slots on the bezel.
This section describes how to remove and replace the expansion-card cage.
To remove the expansion-card cage from the small-form-factor chassis, perform the following steps.
|
CAUTION: Before you remove the computer cover, see "Safety First—For You and Your Computer." |
Checkany cables connected to
expansion cards through the back-panel openings. Disconnect any cables that will not reach
to where the cage must be placed upon removal from the chassis.
Figure 13. Removing the Expansion-Card Cage From the Small-Form-Factor Chassis
 |
|
To replace the expansion-card cage in the small-form-factor chassis, perform the following steps:
To remove the expansion-card cage from the low-profile chassis or midsize chassis, perform the following steps.
|
CAUTION: Before you remove the computer cover, see "Safety First—For You and Your Computer." |
Figure 14. Removing the Expansion-Card Cage From the Low-Profile or Midsize Chassis
 |
|
To replace the expansion-card cage in the low-profile chassis or midsize chassis, perform the following steps:
To remove the expansion-card cage from the mini tower chassis, perform the following steps.
|
CAUTION: Before you remove the computer cover, see "Safety First—For You and Your Computer." |
Figure 15. Removing the Expansion-Card Cage From the Mini Tower Chassis
 |
|
To replace the expansion-card cage in the mini tower chassis, perform the following steps:
