See Section 3.15 “How to Set the Serial Port Jumpers” on page 122 and Section
3.16 “How to Set the Flash PROM Jumpers” on page 124.
3. Position the replacement main logic board in the chassis.
Align the notches on the sides of the board with the corresponding tabs on the
chassis.
4. Slide the main logic board toward the back of the system.
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Sun Enterprise 220R Server Service Manual ♦ January 2000, Revision A