Dell PowerVault 770N (Deskside NAS Appliance) - Manual (Page 41)

Replacing a Power Supply
1. Slide the power supply into the chassis until it snaps into place (see Figure 4-13 ).
2. If the system has one power supply, reconnect the system and peripherals to their electrical outlets, and turn them on.
NOTE: After installing a power supply, allow several seconds for the system to recognize the power supply and
determine whether it is working properly. The power-on indicator will turn green to signify that the power supply
is functioning properly (see Figure 3-4 ).
3. Close the bezel (see " Replacing the Bezel ").
Expansion Cards
The system includes seven expansion slots. The expansion cards are installed on the system board (see Figure 5-3 to identify
the expansion slots).
CAUTION: Only trained service technicians are authorized to remove the system cover and access any of
the components inside the system. See your System Information Guide for complete information about
safety precautions, working inside the computer, and protecting against electrostatic discharge.
Expansion Card Installation Guidelines
You can install expansion cards of different operating speeds on the same bus; however, the bus will operate at the slowest
operating speed of the cards on that bus. For example, if one card on the bus has an operating speed of 66 MHz and the
other card has an operating speed of 100 MHz, the bus will only operate at 66 MHz.
To identify expansion slots, see Figure 5-3 . Table 4-1 lists the PCI bus, operating speed, and signalling level for each
expansion-card slot.