Sun Microsystems Cobalt LX50, User Manual

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Chapter 5: Maintaining the Server
5-24 User Guide—Sun Cobalt LX50 Server
Server Main Board
To replace the server Main Board, follow these steps:
1. Open the box containing the replacement board and remove one of the two antistatic pads. You will need this pad
in step 16 as an ESD-safe place to place the old server board.
2. Before removing the cover to work inside the system, observe the previously mentioned safety guidelines.
3. Remove the cover from the chassis.
4. Remove both riser card/PCI card assemblies (see “PCI Cards” on page 5-13).
5. Remove the power supply unit (see “Power Supply Unit” on page 5-7).
6. Remove the air baffle (see “Air Baffle” on page 5-10).
7. Disconnect the USB cable from the server board.
8. At the SCSI backplane board, disconnect the ribbon cable that comes from the front panel board.
9. Remove the fan module (see “Fan Module” on page 5-11).
10. Disconnect both ends of all remaining cables.
11. Remove the SCSI backplane board.
12. Remove the power distribution board (the board the power supply module connector plugs into).
13. Remove any processors, terminators, and memory cards that you wish to use with the new board.
14. Remove the mounting screws that secure the server board to the chassis (see Figure 79).
✍
Note : The Main Board contains no DIMMs or CPUs, and is packaged in an ESD bag with two
foam pieces and an ESD wrist strap. Be sure to observe all ESD safety guidelines when
handling the board.
!
Caution : The procedure below is for the attention of qualified service engineers only. Before
touching or replacing any component inside the LX50 server, disconnect all cables and follow
the instructions in “Safety: Before You Remove the Cover” on page 5-2 and “Removing and
Replacing the Cover” on page 5-3. Always place the server on a grounded ESD pad and wear a
properly grounded antistatic wrist strap.