System boardComplete the following steps to remove the system board.Note:v Read “Installation guidelines” on page 11.v Read Appendix B, “Safety information,” on page 153.v Read “Handling static-sensitive devices” on page 12.1. Turn off the server and any attached devices.Note: When replacing the system board, you must either update the systemwith the latest firmware or restore the pre-existing firmware that thecustomer provides on a diskette or CD image.2. Disconnect external cables and option cables from the back of the server.3. Lay the server so that the cover is facing up.4. Remove the left-side cover (see “Removing the left-side cover” on page 14).5. Disconnect and remove adapters and spacers (see “Installing or replacing anadapter” on page 25).6. Remove the center-fan and adapter support bracket (see “Center-fan andadapter-support bracket” on page 67).7. Remove the air-baffle.8. Disconnect all cables from the system board.Note: Place all disconnected cables carefully to the side so that they do notcome in contact with the center of the system board.9. Remove all microprocessors and VRMs and set them aside on astatic-protected surface for reinstallation (see “Microprocessor removal” onpage 56).10. Remove the memory modules and set them aside on a static-protected surfacefor reinstallation (see “Installing memory modules” on page 33).Note: When you set the DIMMs aside, be sure to keep track of the slots theybelong to; DIMMs must be installed in pairs of the same size, speed,type, and technology.76 xSeries 236 Type 8841: Hardware Maintenance Manual and Troubleshooting Guide
