Compaq Deskpro EN Series Maintenance & Service Manual page 151

6.10.4 Riser Board Removal
1. Prepare the computer for disassembly (Section 6.3).
CAUTION: When the computer is plugged into an AC power source, there is always voltage applied to the
system board. You must disconnect the power cord from the power source before opening the computer
to prevent system board or component damage.
2. Remove the access panel (Section 6.6).
3. Remove the expansion board cage from the chassis (Section 6.10.3).
4. Remove the expansion boards from the expansion board cage by first removing the retaining
screw that secures each board to the assembly. Be sure you disconnect any interconnect cables
attached to the expansion boards before removing the boards.
5. Disconnect the fan control cable from the riser board at P8 1.
6. Remove the three screws securing the riser board to the expansion board cage 2, then remove
the riser board 3.
Removing the Riser Board from the Expansion Board Cage
To replace the riser board, reverse the removal procedure.
6-20 Minitower Removal and Replacement