Sun Microsystems Enterprise 250 Owner's Manual page 135

2. Disconnect the internal cables from the main logic board.
Press the tab on the cable connector to detach each cable.
a. Disconnect the two power cables at connectors J2902 and J2903.
b. Disconnect the two power sense cables at connectors J2901 and J4501.
c. Disconnect the SCSI backplane data cable at connector J1801.
3. Loosen the three captive screws securing the main logic board to the rear panel.
Figure 6–2
Note - Be sure to remove the SSP paddle card and all PCI cards prior to
removing the main logic board. See "Before You Begin" on page 100.
4. Slide the main logic board away from the rear panel until it is free.
5. Pull the bottom edge of the main logic board away from the machine, and lift
the board out of the system.
Removing and Installing Main Logic Board Components
101