Dell Dimension E521 - Manual (Page 109)

Appendix
109
Connectors
External connectors:
Video 15-hole connector
Network adapter RJ-45 connector
USB two front-panel and four back-panel USB 2.0-compliant
connectors
Audio six connectors for 7.1 support
System board connectors:
Serial ATA four 7-pin connectors
Internal USB device one 10-pin connector (supports two USB ports)
Floppy drive one 34-pin connector
Fan one 5-pin connectors
PCI 2.3 two 124-pin connectors
PCI Express x1 one 36-pin connector
PCI Express x16 one 164-pin connector
Front panel one 40-pin connector
Processor one 940-pin connector
Memory four 240-pin connectors
Power 12V one 4-pin connector
Power one 24-pin connector
Controls and Lights
Front of computer:
Power button push button
Power light green light — Blinking green in sleep state; solid green for power-
on state.
amber light — Blinking amber indicates a problem with the power
supply inside the computer. If the system cannot boot and there is
a solid amber light, this indicates a problem with the system board
(see "Power Problems" on page 43).
Diagnostic lights four lights on the front panel (see "Diagnostic Lights" on page 49.)
Standby power light AUX_PWR_LED on the system board
Hard-drive activity light green light — When the computer is reading data from or writing
data to the hard drive.
book.book Page 109 Monday, July 23, 2007 3:47 PM