Your system is equipped with four diagnostic code indicators, which
are labeled "A," "B," "C," and "D" on the back of
the computer. Each of the four indicators can be yellow, green, or off as shown in Table 1. When the computer is turned on or restarted and the system is functioning
normally, the indicators flash during power-on self-test (POST). After the system starts,
the indicators remain green to signify normal system operation.
If a malfunction is detected and the computer fails to start, the
indicators display a code that identifies the problem. Write down the diagnostic code
displayed and look it up in Table 1.
Make sure that the system is connected to a known
working electrical outlet, and then check whether the front-panel
power indicator is on or off. If the power indicator is off, check the power supply. If the problem persists, refer
to Chapter 7, "Getting Help," of the Reference and
Troubleshooting Guide for instructions on obtaining technical assistance.
See "Precautionary
Measures," and then remove all expansion cards. If the system still does not start, see Chapter 7, "Getting
Help," of the Reference and Troubleshooting Guide for instructions on
obtaining technical assistance.
System board is receiving power, but the
BIOS is not executing.
Set the configuration jumper to Maintenance mode, and restart the system. Exit and save changes in the system setup program. Turn off the computer and
reset the configuration jumper to Normal mode, and then restart the system.
See "Precautionary
Measures," and then remove all expansion cards and restart the system to
determine if a resource conflict exists. If a conflict exists, resolve the conflict as
described in "Resolving Software and Hardware Incompatibilities" in Chapter 5 of
the Reference and Troubleshooting Guide. If the problem persists, see
Chapter 7, "Getting Help," of the Reference and Troubleshooting Guide for
instructions on obtaining technical assistance.
Recovery mode from BIOS failure.
Set the configuration jumper to Maintenance mode and restart the system. Exit and save changes in the system setup program. Turn off the computer and
reset the configuration jumper to Normal mode, and then restart the system.
See "Precautionary Measures,"
and then remove all expansion
cards and restart the system to determine if a resource
conflict exists. If a conflict exists, resolve the conflict as described in
"Resolving Software and Hardware Incompatibilities" in Chapter 5 of the Reference
and Troubleshooting Guide. If the problem persists, see Chapter 7,
"Getting Help," of the Reference and Troubleshooting Guide for
instructions on obtaining technical assistance.
Microprocessor has failed a BIOS test.
If the problem persists, see Chapter 7,
"Getting Help," of the Reference and Troubleshooting Guide for
instructions on obtaining technical assistance.
Memory failed to be sized or enabled.
Reseat the RIMMs and continuity modules
(if any). If the problem persists, see Chapter 7, "Getting Help,"
of the Reference and Troubleshooting Guide for instructions on obtaining
technical assistance.
PCI bus failure has occurred.
See "Precautionary Measures," and then remove all expansion cards and restart the system to determine if a
resource conflict exists. If a conflict exists, resolve the conflict as described in
"Resolving Software and Hardware Incompatibilities" in Chapter 5 of the Reference
and Troubleshooting Guide. If the problem still persists, see Chapter 7, "Getting Help," of the Reference and
Troubleshooting Guide for instructions on obtaining technical assistance.
Video controller failed to initialize or
respond.
Reseat the video card. If the problem persists, see Chapter 7,
“Getting Help,” of the Reference and Troubleshooting Guide for
instructions on obtaining technical assistance.
IDE bus failure has occurred.
Reseat the IDE cables. If the problem
persists, see Chapter 7, "Getting Help," of the Reference
and Troubleshooting Guide for instructions on obtaining technical assistance.
USB port or a device connected to it has
failed initialization.
Disconnect the device from the USB connector. If the problem persists, see
Chapter 7, "Getting Help," of the Reference and Troubleshooting Guide for
instructions on obtaining technical assistance.
Other failure.
See Chapter 7, "Getting Help,"
of the Reference and Troubleshooting Guide for instructions on obtaining
technical assistance.
System has started and turned over control
to the operating system.
No action is necessary.
NOTE: The Glossary
defines abbreviations and acronyms.
If the monitor cannot display errors or problems, during POST the
computer might emit a series of beeps, or beep code, that identifies the problem. Table 2
lists the POST beep codes.
The first column in Table 3 lists (in alphabetical order) system
messages that might appear on the screen during the boot routine or during normal system
operation. The second column in the table lists probable causes of the messages, and the
third column either provides a corrective action or refers you to a source for resolving
the problem.
The hard-disk driveis not working or
is not configured correctly.
Ensure that the drive is installed correctly
in the chassis and defined correctly in the system setup program.
Cache Memory Bad, Do Not Enable Cache
Cache memory is not operating.
See Chapter 7, "Getting Help," of the Reference
and Troubleshooting Guide for instructions on obtaining technical assistance.
CH-2 Timer Error
An error is occurring on the timer
on the system board.
See Chapter 7, "Getting Help," of the Reference
and Troubleshooting Guide for instructions on obtaining technical assistance.
CMOS Battery State Low
CMOS Checksum Failure
CMOS System Options Not Set
CMOS Display Type Mismatch
CMOS Memory Size Mismatch
CMOS Time and Date Not Set
The system configuration information in the system
setup program is incorrect, or the battery charge may be low.
Enter the system setup program and verify the system
configuration; then restart the system.
Diskette Boot Failure
Drive A or B is present but has failed the BIOS POST.
Ensure that the drive
is installed correctly in the chassis and defined correctly in the system setup program.
Check the interface cable at both ends.
DMA Error
DMA
1 Error
DMA 2 Error
Error in the DMA controller on the system board.
The keyboard or system board may need to be replaced.
FDD Controller Failure
HDD Controller Failure
BIOS cannot communicate with the diskette drive or
hard-disk drive controller.
Ensure that the drive
is installed correctly in the chassis and defined correctly in the system setup program.
Check the interface cable at both ends.
INTR1 Error
INTR2
Error
Interrupt channel on the system board failed to POST.
The keyboard or system board may need to be replaced.
Invalid Boot Diskette
The operating system cannot be located on drive A or
drive C.
Enter the system setup program and confirm that drive A
or drive C is properly identified.
Keyboard Error
The BIOS has detected a stuck key.
Make sure that nothing is resting on the keyboard; if a key appears
to be stuck, carefully pry it up. If the problem persists, you may need to replace the
keyboard.
KB/Interface Error
An error occurred with the keyboard connector.
The keyboard or system board may need to be replaced.
No ROM Basic
The operating system cannot be located on drive A or
drive C.
Enter the system setup program and confirm that drive A
or drive C is properly identified.
NOTE: The Glossary
defines abbreviations and acronyms.
