Lenovo NetVista Hardware Maintenance Manual (HMM) for Aptiva and NetVista 2255 - Page 60

Index of Symptoms, Messages, Error Codes, or Beeps, How to Use Error Messages, ATTENTION, Diagnostics

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Index of Symptoms, Messages, Error Codes, or Beeps How to Use Error Messages: Use the messages, error codes, and beeps combinations that occur to diagnose failures. If more than one failure occurs, diagnose from the first failure that appears. The cause of the first failure can result in false messages, error codes, or beeps. If you did not receive any messages, error codes, or beeps, see if the symptom is listed in Table 2-3, " Error Symptoms List" on page 65. ATTENTION: When you have replaced a FRU, you must run the diagnostics to ensure that no other activity has been affected by the change. This system check can be done through the diagnostics program (Select Diagnostics, then select and execute All Tests from PC-Doctor). POST: Some diagnostic aids are resident in the machine, such as the Power-On Self Test (POST). The machine performs the POST each time it is powered on. Use this information throughout the diagnostic procedures. The POST is a series of system checks and initializations that verify the correct operation of the base system. After a successful POST, the system attempts to load the operating system. The system can be customized for different startup (boot) methods by the BIOS Setup Utility. See "Advanced Setup" on page 47. The system's default startup sequence automatically looks for the operating system files in the hard disk if these files are not found in the diskette. NOTE: Remember that POST does not test all areas, but only those that allow the system to operate well enough to run the diagnostics program. Table 2-1 lists BIOS error codes, messages, and beeps and their possible causes, table 2-3 lists error symptoms and their possible causes. The most likely cause is listed first. Make sure you complete all items in the cause or "Action/FRU" column. When servicing a system, always begin with "Start" on page 55. If the problem cannot be corrected using these two index tables, go to "Undetermined Problems" on page 84. 60

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60
Index of Symptoms, Messages, Error Codes, or Beeps
How to Use Error Messages:
Use the messages, error codes, and beeps combinations that occur to diagnose failures. If
more than one failure occurs, diagnose from the first failure that appears. The cause of the first failure can result in false
messages, error codes, or beeps. If you did not receive any messages, error codes, or beeps, see if the symptom is listed in
Table 2-3, " Error Symptoms List” on page 65.
ATTENTION:
When you have replaced a FRU, you must run the diagnostics to ensure that no other activity has been
affected by the change. This system check can be done through the diagnostics program (Select
Diagnostics
, then select and execute
All Tests
from PC-Doctor).
POST:
Some diagnostic aids are resident in the machine, such as the Power-On Self Test (POST). The machine performs
the POST each time it is powered on. Use this information throughout the diagnostic procedures. The POST is a series of
system checks and initializations that verify the correct operation of the base system.
After a successful POST, the system attempts to load the operating system. The system can be customized for different
startup (boot) methods by the BIOS Setup Utility. See “Advanced Setup” on page 47.
The system's default startup sequence automatically looks for the operating system files in the hard disk if these files are not
found in the diskette.
NOTE:
Remember that POST does not test all areas, but only those that allow the system to operate well enough to run
the diagnostics program.
Table 2-1 lists BIOS error codes, messages, and beeps and their possible causes, table 2-3 lists error symptoms and their
possible causes. The most likely cause is listed first. Make sure you complete all items in the cause or "Action/FRU" column.
When servicing a system, always begin with "Start" on page 55.
If the problem cannot be corrected using these two index tables, go to “Undetermined Problems” on page 84.