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System Board

Dell™ OptiPlex™ GX280 Systems User's Guide

  Small Form-Factor System Board

  Small Desktop System Board

  Small Mini-Tower System Board

  Replacing the System Board



Small Form-Factor System Board

1

RTC reset jumper (RTCRST)

14

line-in, line-out, and microphone connectors (AUDIO)

2

floppy drive connector (DSKT)

15

network connector (NIC) and USB connector (USB2)

3

battery socket (BATTERY)

16

USB connectors (USB1)

4

internal speaker (SPEAKER)

17

diagnostic lights (DIAG LED)

5

CD/DVD drive connector (IDE)

18

serial port connector (SER1) and video connector (VGA)

6

front-panel connector (FRONTPANEL)

19

parallel port connector (PAR)

7

serial ATA drive 0 connector (SATA0)

20

power connector (12VPOWER)

8

standby power light (AUX_PWR)

21

processor and heat-sink connector (CPU)

9

memory module connectors (DIMM1 and DIMM2)

22

heat sink/blower retention pad

10

PCI Express x16 connector (PEG)

23

serial port 2 connector (SER_PS2)

11

PCI riser connector (PCI)

24

fan connector (FAN)

12

CD drive analog audio cable connector for optional analog audio cable (CD_IN)

25

password jumper (PSWD)

13

front-panel audio cable connector (FRONTAUDIO)

26

power connector (POWER)


Small Desktop System Board

NOTE: Your computer may or may not have the "SATA1" connector.

1

RTC reset jumper (RTCRST)

15

front-panel audio cable connector (FRONTAUDIO)

2

power connector (POWER)

16

line-in, line-out, and microphone connectors (AUDIO)

3

floppy drive connector (DSKT)

17

network connector (NIC) and USB connector (USB2)

4

battery socket (BATTERY)

18

USB connectors (USB1)

5

internal speaker (SPEAKER)

19

diagnostic lights (DIAG LED)

6

front-panel connector (FRONT PANEL)

20

serial port connector (SER1) and video connector (VGA)

7

CD/DVD drive connector (IDE)

21

parallel port connector (PAR)

8

serial ATA drive 1 connector (SATA1)
NOTE: Your computer may or may not have the "SATA1" connector.

22

power connector (12VPOWER)

9

serial ATA drive 0 connector (SATA0)

23

processor connector (CPU)

10

standby power light (AUX_PWR)

24

heat-sink/blower retention pad

11

memory module connectors (DIMM1, DIMM2, DIMM3, DIMM4)

25

fan connector (FAN)

12

PCI Express x16 connector (PEG)

26

serial port 2 connector (SER_PS2)

13

PCI riser connector (PCI2)

27

password jumper (PSWD)

14

CD drive analog audio cable connector for optional analog audio cable (CD_IN)

 

 


Small Mini-Tower System Board

NOTE: Your computer may or may not have the "SATA1" or "SATA3" connectors.

1

power connector (POWER)

15

line-in, line-out, and microphone connectors (AUDIO)

2

RTC reset jumper (RTCRST)

16

network connector (NIC) and USB connector (USB2)

3

floppy drive connector (DSKT)

17

USB connectors (USB1)

4

internal speaker (SPEAKER)

18

diagnostic lights (DIAG LED)

5

CD/DVD drive connector (IDE)

19

serial port connector (SER1) and video connector (VGA)

6

front-panel connector (FRONTPANEL)

20

parallel port connector (PAR)

7

serial ATA drive connectors (SATA0, SATA1, SATA2, SATA3)
NOTE: Your computer may or may not have the "SATA1" or "SATA3" connectors.

21

power connector (12VPOWER)

8

standby power light (AUX_PWR)

22

processor connector (CPU)

9

battery socket (BATTERY)

23

heat-sink/blower retention pad

10

PCI Express x16 connector (PEG)

24

fan connector (FAN)

11

PCI connectors (PCI0, PCI1, PCI2)

25

serial port 2 connector (SER_PS2)

12

PCI Express x1 connector (PE1)

26

memory module connectors (DIMM1, DIMM2, DIMM3, DIMM4)

13

CD drive analog audio cable connector for optional analog audio cable (CD_IN)

27

password jumper (PSWD)

14

front-panel audio cable connector (FRONTAUDIO)

 

 

Jumper Settings

The jumper locations on the small form-factor, small desktop, and small mini-tower computers are shown below, respectively.

Small Form-Factor Computer

Small Desktop Computer

Small Mini-Tower Computer

Jumper

Setting

Description

PSWD

(default)

Password features are enabled.

Password features are disabled.

RTCRST

Real-time clock reset.

  jumpered   unjumpered


Removing the System Board

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

    1.      Follow the procedures in "Before You Begin."

    2.      Remove any components that restrict access to the system board.

    3.      Disconnect all cables from the system board.

    4.      Before you remove the existing system board assembly, visually compare the replacement system board to the system board in your computer to ensure that you have the correct part.

NOTE: Your replacement board may or may not be attached to a metal tray. If your original system board was attached to a tray, you need to transfer the replacement board to the metal tray before you install the new board.
NOTE: To determine the chassis configuration, inspect the front portion of the system board for a green release tab. If the tab is present, your chassis uses the metal tray. If the tab is not present, your system uses the direct mounting method.

    5.      Remove the system board:

    a.      If your system board is mounted using the metal tray, the board and the tray are connected and removed as one piece. Remove the screw next to the release tab. Pull up on the tab and slide the system board assembly toward the front of the computer, and then lift the board away.

    b.      If your system board is mounted directly to the computer, remove the retention screw at the front of the computer. Slide the system board toward the front of the computer, detaching it from the hooks on the floor of the chassis, and then lift the board away.

     

System Board/Metal Tray Assembly Removal  

System Board Removal

 

  1. Place the system board assembly that you just removed next to the replacement system board.

Replacing the System Board

1.      If your original system board and replacement system board share the same mounting configuration, replace the existing system board with the replacement system board.

2.      If your existing system board was attached to a metal tray and your replacement system board is not attached to a metal tray:

a.      Remove the screw that secures the original board to the metal tray. Remove the four mounting screws from the heat-sink retention base, and then remove the system board by sliding the board back and detaching it from the hooks on the metal tray.

b.      Remove the replacement system board from the mounting plate by removing the four mounting screws from the heat-sink retention base. Set the mounting plate aside.

c.   To install the replacement system board on the metal tray, slide the board forward to attach the board to the hooks on the metal tray. Install the retention base using the four mounting screws, and then replace the screw at the front of the system board.

d.       Install the mounting plate on the original system board, using the retention base and the four mounting screws.

3.      Transfer components from the existing system board to the replacement system board:

a.      Remove the memory modules and install them on the replacement board.

CAUTION: The processor package and heat-sink assembly can get hot. To avoid burns, ensure that the package and assembly have had sufficient time to cool before you touch them.

b.      Remove the heat-sink assembly and processor from the existing system board and transfer them to the replacement system board.

4.      Configure the settings of the replacement system board.

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

NOTE: Some components and connectors on the replacement system board may be in different locations than the corresponding connectors on the existing system board.

6.      Orient the replacement board by aligning the notches on the bottom to the tabs on the computer.

7.      Replace the system board:

a.      If your system board is attached to a metal tray, slide the system board assembly toward the back of the computer until the board clicks into position.

b.      If your chassis used the direct mounting configuration, slide the system board into position and replace the retention screw.

8.      Replace any components and cables that you removed from the system board.

9.      Reconnect all cables to their connectors at the back of the computer.

10.   Close the computer cover.

11.  Attach the computer stand.

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

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


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