Dell 4691901 owner manual Controls and Lights

System Board Connectors

Mini-Tower, Desktop	two 3-pin connector
Small Form Factor	one 5-pin connector
Front panel control	one 16-pin, two 10–pin, and one 5-pin connector
Processor	one 1155-pin connector
Processor Fan
Mini-Tower, Desktop	one 4-pin connector
Small Form Factor	one 5-pin connector
Password clear jumper	one 3-pin connector
RTC reset jumper	one 3-pin connector
Internal speaker	one 5-pin connector
Intruder connector	one 3-pin connector
Power connector	one 24-pin and one 4-pin connector
Controls and Lights
Front of the computer:
Power button light	Blue light — Solid blue light indicates power-on
	state; blinking blue light indicates sleep state of
	the computer.
	Amber light — Solid amber light when the
	computer does not start indicates a problem
	with the system board or power supply. Blinking
	amber light indicates a problem with the system
	board.
Drive activity light	Blue light — Blinking blue light indicates that the
	computer is reading data from or writing data to
	the hard drive.
Diagnostic lights	Four lights located on the front panel of the
	computer. For more information on the
	diagnostic lights, see the Service Manual at
	support.dell.com/manuals.
Back of the computer:
Power supply diagnostic light	Green light — The power supply is turned on
	and is functional. The power cable must be
	connected to the power connector (at the back
	of the computer) and the electrical outlet.

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