Dell OptiPlex 780 Service Manual page 9

Desktop
Small form factor
PCI Express x1
Mini-tower
Desktop
Small form factor
PCI Express x16
Serial ATA
Mini-tower
Desktop
Small form factor
Memory
Internal USB device
Processor fan
Hard-drive fan
Front panel control
Processor
Power 12V
Power
Controls and Lights
Front of the computer
Power button
Power light
Drive activity light
Network connectivity light
two 120-pin connectors
one 120-pin connector
data width (maximum) — one PCI Express
lane
one 36-pin connector
not applicable
not applicable
one 164-pin connector
data width (maximum) — 16 PCI Express
lanes
four 7-pin connectors
three 7-pin connectors
three 7-pin connectors
four 240-pin connectors
one 10-pin connector (supports two USB
ports)
one 5-pin connector
one 5-pin connector
one 40-pin connector
one 775-pin connector
one 4-pin connector
one 24-pin connector
push button
blinking green — indicates that the
computer is in sleep state
solid green — indicates that the computer
is in power-on state
blinking amber — indicates a problem
with the system board
solid amber — indicates that the system
board is unable to initialize
blinking green — indicates that the
computer is reading data from or writing
data to the hard drive
green — indicates that a good connection
exists between the network and the
computer
off (no light) — indicates that the
computer is not detecting a physical
connection to the network