CONFIDENTIAL
26
Removing the MLB (Main Logic Board)
1. Remove the chassis cover (
refer to
Chassis Cover Removal/Installation
on page 6).
2. Place the computer on its side with the MLB on the bottom and the open side facing up.
3. Remove the base from the chassis. The base is retained with two screws on the back in the bottom
center of the computer and one directly on the bottom of the computer. Slide the base toward the rear
of the computer to remove it.
4. Remove the PCI card(s) (
refer to
Removing PCI Cards
on page 16).
5. Remove PCI card and assembly (
refer to
PCI Riser Card Removal/Installation
on page 19).
6. Disconnect the fan wire from the main logic board before removing the fan and crossbar.
7. Remove the CPU card (
refer to
Removing the CPU
on page 13).
8. Remove the cache card (
refer to
Removing the Cache
on page 15).
9. Remove the VRAM (
refer to
VRAM Removal/Installation
on page 11).
10. Remove the RAM (
refer to
RAM Removal/Installation
on page 9).
11. Disconnect the cables attached to the MLB. Disconnect the power cable by pressing the
retaining clip facing the front of the computer, then pulling straight up. Disconnect all other
cables by pulling them straight up from their sockets.
12. Remove the eight screws that secure the logic board to the chassis.
13. Lift the edge of the MLB closest to the bezel and slide the MLB out of the chassis at an angle.
Removal/Installation of MLB
Removal/Installation of MLB