Before removing any parts, power-off the computer, unplug all power cords from electrical outlets, then disconnect any interconnecting cables.

Attention: The system board, processors, adapter cards, DIMMs, and upgrade processors can be damaged by electrostatic discharge. Use an electrostatic discharge (ESD) strap to establish personal grounding. If you don't have an ESD strap, establish personal grounding by touching a ground point with one hand before touching the static-sensitive parts.

The arrows in the removals and replacements procedures show the direction of movement to remove a part, to turn a screw, or the direction to press a tab to release the part.

Begin all removals by removing the cover (and rear cover, if applicable). When other parts must be removed prior to removing the failing part, they are listed at the top of the page. Go to the removal procedure for each part listed, remove the part, and then continue with the removal of the failing part. To replace a part, reverse the removal procedure and follow any notes that pertain to replacement. Before disconnecting any cables, note their location and orientation. Reinstall any new parts with cabling in their original location.