Digital Equipment 3100R Series, Service Maintenance Manual, Page: 131 / 174

FRU Replacement
5-56
Removing and Replacing the Main Logic Board
1. Turn off the server.
2. Remove the front bezel.
3. Remove the two screws securing the server to the rack and then slide it out.
4. Remove the screw securing the top cover to the server.
5. Remove the top cover.
6. Disconnect all cables from the main logic board.
7. Record all EISA and PCI slot assignments before removing the expansion
boards.
8. Remove the expansion boards, processor module, and network card.
9. Remove the screws securing the main logic board to the chassis (A, Figure
5-24).
10. Slide the main logic board toward the front of the chassis to release it from
the standoffs.
11. Carefully lift the main logic board up and away from the chassis.
12. Configure switch SW1 on the new main logic board.
13. If the new main logic board does not have a battery/RTC, remove the
battery/RTC from the old main logic board and replace it on the new main
logic board.
14. Align the main logic board over the standoffs and then slide it toward the rear
of the chassis.
15. Secure the main logic board to the chassis using the previously removed
screws.
16. Using the side panel label as a reference, reconnect all cables to the main
logic board.
17. Using information recorded in step 7, install the expansion boards, processor
module, and network card to their original configuration.