Replacing The System Board - Dell OptiPlex 270 Service Manual

10. Remove the system board:
a. If your system board is attached to a metal tray, the board and the tray are connected and are removed as one piece. Pull up on the tab and
slide the system board assembly toward the front of the computer, and then lift the board up and away.
b. If your system board is secured to the computer with a screw, remove the screw and 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 up and away.
System Board/Metal Tray Assembly Removal
11. 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 was attached to a metal tray and your replacement system board is not attached to a tray, attach the replacement board
to the metal tray:
a. Remove the screw that secures the original board to the metal tray, and then remove the system board by sliding the board back and detaching
it from the hooks on the metal tray.
b. Set the replacement system board on the metal tray, slide it forward to attach the board to the hooks on the metal tray, and then replace the
screw.
2. 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 microprocessor 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 microprocessor from the existing system board and transfer them to the replacement system board.
3. Configure the settings of the replacement system board.
4. 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.
5. Orient the replacement board by aligning the notches on the bottom to the tabs on the computer.
6. 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 you removed a screw in
7. Replace any components and cables that you removed from the system board.
8. Reconnect all cables to their connectors at the back of the computer.
9. Close the computer cover.
10. 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.
11. Connect your computer and devices to electrical outlets, and turn them on.
System Board Removal
step b in the previous procedure, slide the system board into position and replace the screw.