NEC EXPRESS5800/120Rc-2 Service Manual page 123

A
Figure 4-55. Removing the System Board
7. Slide the system board towards the front of the chassis to disengage the tabs
located on the bottom of the system board from the slots in the bottom of the
chassis.
8. Lift the side of the system board nearest the front of the chassis up and
remove the system board from the chassis and place it component-side up on
a nonconductive, static free surface.
9. Set the replacement system board into the chassis and slide it to the rear of
the chassis to engage the tabs located on the bottom of the system board into
the slots in the bottom of the chassis.
10. Install the thumbscrew removed in Step 6 into the center hole in the system
board. See Figure 4-55, A.
11. Reconnect all power and signal cable removed in Step 5 to the system board.
12. Grasp each side of the frame of the PCI I/O board and position the board
above the system board. Slide the PCI I/O board down into the system
board, ensuring the two tabs on the system chassis are inserted into the slots
on the PCI I/O board frame. See Figure 4-56, A.
Disassembly and Reassembly 4-47