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16 Indicators, Messages, and Codes
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System Messages
System messages appear on the screen during power-on self test (POST) to notify you of a possible
problem with the system. Table 2-3 lists the system messages that can occur and the probable cause
and corrective action for each message.
NOTE: If you receive a system message that is not listed in Table 2-3, check the documentation for the
application that is running when the message appears or the operating system's documentation for an
explanation of the message and recommended action.
Table 2-2. Back-Panel LED Codes
LED Indicator LED States Description
Status Off The system is off.
Blue The system is operating normally.
Blue blinking The system is identifying itself due to
the pressing of the identification
button.
NOTE: Systems management software
causes the indicator to blink to identify
the system.
Amber blinking Indicates a fault with the system.
NIC link/activity Off The network adapter is not connected to
the network.
Green The network adapter has established a
link to the network
Flashing green Data is being transmitted.
Table 2-3. System Messages
Message Causes Corrective Actions
Address mark not found Faulty hard-drive subsystem; defective
system board.
Ensure that the hard drive cables are
properly connected. See
"Troubleshooting Hard Drives" in
"Troubleshooting Your System" for the
appropriate drive(s) installed. If the
problem persists, the system board may
be defective. See "Troubleshooting the
System Board."
Alert! Cover was
previously removed!
The chassis has been opened. Information only.
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