Use the procedures in "Removing a Board" to remove the applicable I/O+ board.
If a PCI card is already installed in the slot designated for replacement of the riser card, remove the card as indicated in "Removing a PCI Card".
If there is no PCI card presently installed, proceed to Step 3.
Remove two screws securing the existing riser card to the PCI+ I/O board (see Figure 4-23) and remove the riser card.
Secure the new riser card onto the PCI+ I/O board using the two screws removed in Step 3.
If a PCI card was removed in Step 2, replace the card as indicated in the "Replacing or Installing a PCI Card".