3Com CS/2500 Installation Manual

Contents

Upgrades 5-13Replacing MemoryChipsIf you ever need to replace memory chips on the motherboard, followthis procedure:1 Make sure server power is off and the power cord is unplugged.2 Remove the cover, as described in “Removing the Cover” on page 5-6.The memory chips are located on the motherboard, near the front of theserver, as shown in Figure 5-5. As shipped, all RAM is stored on fourchips (each with a 1 MB x 4 configuration) in slots U5, U7, U9, andU11.3 Remove the old memory chips that you want to replace.Using the thumb and forefinger of one or both hands, grasp the front andback of the chip and gently rock it back and forth until it becomes loose.Lift the chip out of its socket.As you remove the chip, note exactly how it was oriented. The beveledtop edge of the chip faces the left side of the chassis (when viewed fromthe front of the server).4 Remove a new memory chip from its antistatic foam shipping pad.If the pins have been bent, carefully straighten them. Orient the chipwith the beveled corner closest to the front of the server.All memory chips must have the same orientation.CAUTION: Failure to place the memory chips correctly will cause theself-test diagnostics to fail and possible server or memory chip damagewhen the server is powered on.5 Being careful to line up the pins with the socket, firmly push eachmemory chip into its socket until it snaps into place.CAUTION: Be sure that no pins are bent under the body of the chip.Each pin must be inserted properly into its socket.6 Repeat steps 4 and 5 for the remaining chips.7 Replace the cover, as described in “Replacing the Cover” on page 5-15.CS2500BookFile : MaintenanceUpgrades Page 13 Thursday, December 11, 1997 10:44 AM