Intel SC450NX Product Guide - Page 110
Baseboard, Removing the Baseboard
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Chassis covers, proper cooling, and airflow: For proper cooling and airflow, always install the chassis access cover before turning on the system. Operating the system without this cover in place can damage system parts. Installing or removing jumpers: A jumper is a small, plastic-encased conductor that slips over two jumper pins. Newer jumpers have a small tab on top that you can grip with your fingertips or with a pair of fine, needlenosed pliers. If your jumpers do not have such a tab, take care when using needle-nosed pliers to remove or install a jumper; grip the narrow sides of the jumper with the pliers, never the wide sides. Gripping the wide sides can damage the contacts inside the jumper, causing intermittent problems with the function controlled by that jumper. Take care to gently grip, but not squeeze, with the pliers or other tool you use to remove a jumper; you might bend or break the stake pins on the board. Baseboard Removing the Baseboard CAUTIONS The baseboard can be extremely sensitive to ESD and always requires careful handling. After removing it from the system, place it component-side UP on a nonconductive, static-free surface to prevent shorting out the battery leads. If you place the board on a conductive surface, the battery leads may short out. This will result in a loss of CMOS data and will drain the battery. Do not slide the baseboard over any surface. 1. Observe the safety and ESD precautions at the beginning of this chapter. 2. Remove the access cover. 3. Remove the front and rear foam covers. 4. Label and disconnect all internal cables connected to add-in boards. 5. Remove all add-in boards. 6. Label and disconnect all internal cables connected to the baseboard. NOTE The baseboard is attached to the electronics bay. In general, the best method for removing the baseboard is to remove the electronics bay first, particularly in servers mounted in a pedestal (tower) orientation, though this is not a requirement. 7. Open the front subchassis and, if necessary, remove the electronics bay. See "Opening the Subchassis and Electronics Bay" on page 90. 8. Remove the baseboard retaining screws and set them aside. 9. Pull the board toward you slightly to disengage it from two snap-in standoffs, and then slide the board toward the front of the server until the board's I/O connectors clear the rear of the chassis. 110