Dell 390 owner manual Controls and Lights

	System Board Connectors
one 5-pin connector	Small Form Factor
one 3-pin connector	Password clear jumper
one 3-pin connector	RTC reset jumper
one 5-pin connector	Internal speaker
one 3-pin connector	Intruder connector
one 24-pin and one 4-pin connector	Power connector

	Controls and Lights
	:Front of the computer
Blue light — Solid blue light	Power button 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
Blue light — Blinking blue light	Drive activity light
indicates that the computer is
reading data from or writing data to
.the hard drive
Four lights located on the front	Diagnostic lights
panel of the computer. For more
information on the diagnostic lights,
see the Service Manual at
.support.dell.com/manuals
	:Back of the computer
Green light — The power supply is	Power supply diagnostic light
turned on and is functional. The
power cable must be connected to
the power connector (at the back

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