Dell 533CX manual A B C D, = y e l l o w, = g r e e n, = o f f

Diagnostic Light Codes Before POST

The following table lists the codes for the diagnostic lights that occur before the computer begins the POST.

D i a g n o s t i c L i g h t C o d e s B e f o r e P O S T

Light Pattern	Cause	Action
	No electrical power is supplied to the	Connect the computer to its electrical outlet. Ensure that
	computer.	the front-panel power light is on. If the power light is off,
A B C D		ensure that the computer is connected to a working
		electrical outlet, and then press the power button.
		If the problem is still not resolved, contact Dell for
		technical assistance.
	Normal off condition. Computer is	Ensure that the front-panel power light is on. If the power
	connected to its electrical outlet.	light is off, ensure that the computer is connected to a
A B C D		working electrical outlet, and then press the power button.
		When the computer is operating normally, it can be
		automatically or remotely started as long as it remains
		connected to an electrical outlet. For more information, see
		"Power Management" in the User’s Guide.
		If the problem is still not resolved, contact Dell for
		technical assistance.
	Computer is in a reduced power or	Use one of the appropriate methods to "wake up" the
	"sleep" state.	computer. See "Power Management" in the User’s Guide.
A B C D		If the problem is still not resolved, contact Dell for
		technical assistance.
	BIOS is not executing.	See "Reset Corrupted BIOS Settings" in the User’s Guide.
A B C D
	Possible power supply or power cord	See "Power Problems" in the User’s Guide.
	failure.
A B C D
	Possible system board failure.	Contact Dell for technical assistance.
A B C D
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Setup and Quick Reference Guide

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