Dell PowerEdge 4300 Installation And Troubleshooting Manual page 98

7-10 Dell PowerEdge 4300 Systems Installation and Troubleshooting Guide
When you look inside the computer, note the DC power cables leading from the power
supply or optional PSPB. The power cables supply power to the system board, SCSI
backplane board, externally accessible drives, and any expansion cards that connect
to external peripherals.
The wide ribbon cables are the interface cables for internal drives. For non-SCSI drives
such as the diskette drive, an interface cable connects each drive to an interface con-
nector on the system board or on an expansion card. For SCSI devices, interface
cables connect externally accessible SCSI devices and the SCSI backplane board to a
SCSI host adapter either on the system board or on an expansion card. (For more
information, see Chapter 9, "Installing Drives in the External Bays," and Chapter 10,
"Installing Hard-Disk Drives.")
During an installation or troubleshooting procedure, you may be required to change a
jumper or switch setting. For information on the system board jumpers, see
Appendix B, "Jumpers, Switches, and Connectors."
external drive
bays (4)
hard-disk
drive bays (6)
SCSI backplane
board
support
panel
expansion
card
hard-disk drive
cooling fan
assembly
tray
latch
system board