4-22 CRU Replacement and Server Upgrades5. If you are replacing DIMMs, perform Installing DIMMs earlier in thischapter, otherwise continue with the next step.6. Install a DIMM cover in the now empty socket. See Installing DIMMsearlier in this chapter.7. Install the CPU module top cover removed in Step 2, securing it with threescrews.8. Install the CPU module into the system cabinet following procedurespreviously detailed in this chapter.9. Power on the CPU module and reboot the system to ensure POST does notdisplay any error messages. If error messages are displayed, see the POSTerror messages listed in Chapter 5.Replacing a PCI ModuleYour system contains two redundant PCI modules that are accessible from thefront of the server unit.The following subsections provide the procedures for removing and installingPCI modules.Removing a PCI Module1. Observe the safety and ESD precautions listed at the beginning of thischapter.2. Unlock and open the front door on the tower cabinet or front covers on therack-mount system. See Opening and Closing the Front Bezel earlier in thischapter.3. Ensure that the PCI module is off-line by viewing its status LED indicators(See Figure 4-22). The state of the status LEDs should be as follows:Fail lamp: RedState lamp: Off
