Dell XPS 420 owner manual 176

book.book Page 176 Tuesday, November 27, 2007 10:29 AM

Connectors (continued)

System board connectors:

Serial ATA	five 7-pin connectors
FlexBay	2 port USB header
uDOC	1 port USB header
LCD	Dell proprietary USB based LCD header
Fan	two 5-pin connectors
PCI	three 124-pin connectors
PCI Express x1	36-pin connector
PCI Express x16	164-pin connector
PCI Express x4/x8	98-pin connector
Controls and Lights
Power control	push button
Power light	blue light — Blinking blue in sleep state; solid blue
	for power-on state.
	amber light — Blinking amber indicates a problem
	with an installed device; solid amber indicates an
	internal power problem.
Hard-drive access light	blue light — Blinking blue denoting hard drive
	activity state.
Network activity light (front	solid blue indicates network connection.
panel)
Link integrity light (on	green light — A good connection exists between
integrated network adapter)	a 10-Mbps network and the computer.
	orange light — A good connection exists between
	a 100-Mbps network and the computer.
	yellow light — A good connection exists between a
	1-GB (1000-Mbps) network and the computer.
	off (no light) — The computer is not detecting a
	physical connection to the network.

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Appendix