Dell Vostro 420 (Late 2008) - Manual (Page 45)

Working on Your Computer
45
After Working on Your Computer
After you have completed any replacement procedures, ensure that you
connect any external devices, cards, cables, and so on, before turning on your
computer.
1 Replace the computer cover (see "Replacing the Computer Cover" on
page 48).
2 Connect any telephone or network cables to your computer.
NOTICE:
To connect a network cable, first plug the cable into the network device
and then plug it into the computer.
3 Connect your computer and all attached devices to their electrical outlets.
4 Turn on your computer.
1 power connector
(PWR2) 2 processor heat
sink/fan assembly
power 3 memory module
connectors (2)
4 main power connector
(PWR1) 5 serial ATA drive
connector (SATA2) 6 serial ATA drive
connector (SATA1)
7 serial ATA drive
connector (SATA3) 8 serial ATA drive
connector (SATA0) 9 battery socket
10 front I/O panel
connector 11 USB1 system board
connector (from front
I/O panel) 12 USB2 system board
connector (from front
I/O panel)
13 CMOS jumper (CLEAR
CMOS) 14 USB3 system board
connector 15 audio connector
(AUDIO1) (from front
I/O panel)
16 PCI connector (PCI1) 17 PCI connector (PCI2) 18 PCI Express x16
connector (PCIE_x16)
19 PCI Express x1
connector (PCIE_X1) 20 audio connectors 21 one LAN and two USB
ports
22 chassis fan power 23 USB ports (2) 24 video connector (VGA)
25 PS/2 mouse and
keyboard connectors