Specifications

Table C-1 Numeric Codes and Text Messages (continued)

Control panel message Description Recommended action

Invalid Electronic Serial Number Electronic serial number is missing. Enter the correct serial number in Computer

Setup.

Network Server Mode Active and No

Keyboard Attached

Keyboard failure while Network Server

Mode enabled.

1. Reconnect keyboard with computer

turned off.

2. Check connector for bent or missing

pins.

3. Ensure that none of the keys are

depressed.

4. Replace keyboard.

Parity Check 2 Parity RAM failure. Run Computer Setup and Diagnostic utilities.

Interpreting POST Diagnostic Front Panel LEDs and

Audible Codes

During the system validation phase, the BIOS will validate the functionality of the CPU, memory,

graphics, system board and all other platform components. Since the display may not be functional, the

power button LED and the speaker will be used to indicate an error. The speaker will be used so that a

support agent can detect the error code over the phone. The pattern of the blink/beep error indicator

will be 1 blink/beep per second followed by a 2 second pause at the end of the sequence. The

sequence will repeat for 5 cycles. After the 5 cycles are complete, only the blink will continue.

WARNING! When the computer is plugged into an AC power source, voltage is always applied to

the system board. To reduce the risk of personal injury from electrical shock and/or hot surfaces, be

sure to disconnect the power cord from the wall outlet and allow the internal system components to cool

before touching.

Test Failure Power

button LED

Speaker

CPU CPU not functional 1 blink 1 beep

BIOS BIOS corruption 2 blinks 2 beeps

Memory Module error 3 blinks 3 beeps

Graphics No controller 4 blinks 4 beeps

System board Other failure 5 blinks 5 beeps

BIOS Authentication failure, if supported 6 blinks 6 beeps

Interpreting POST Diagnostic Front Panel LEDs and Audible Codes