210 Adding and Replacing PartsInstalling an Additional FanCAUTION: Before you begin any of the procedures in this section, follow thesafety instructions in the Product Information Guide.CAUTION: To guard against electrical shock, always unplug your computer fromthe electrical outlet before opening the cover.CAUTION: For configurations with three SAS hard drives, you must install anadditional fan.NOTICE: To avoid damage to the drive, do not set it on a hard surface. Instead, setthe drive on a surface, such as a foam pad, that will sufficiently cushion it.1 Follow the procedures in "Before You Begin" on page 143.2 Remove the computer cover (see "Removing the Computer Cover" onpage 145).NOTICE: When placing the fan in the computer, ensure that the cables of othercomponents, such as the power supply, remain in their proper position.3 Place the fan flush with the side of the power supply and engage the fanhooks in the three fan slots in the side of the power supply.4 Slide the fan down until it clicks into place.5 Connect the fan cable to the fan connector on the system board.
