IBM NetVista Hardware Maintenance Manual

Contents

60Index of Symptoms, Messages, Error Codes, or BeepsHow to Use Error Messages: Use the messages, error codes, and beeps combinations that occur to diagnose failures. Ifmore than one failure occurs, diagnose from the first failure that appears. The cause of the first failure can result in falsemessages, error codes, or beeps. If you did not receive any messages, error codes, or beeps, see if the symptom is listed inTable 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 beenaffected by the change. This system check can be done through the diagnostics program (SelectDiagnostics, 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 performsthe POST each time it is powered on. Use this information throughout the diagnostic procedures. The POST is a series ofsystem 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 differentstartup (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 notfound in the diskette.NOTE: Remember that POST does not test all areas, but only those that allow the system to operate well enough to runthe diagnostics program.Table 2-1 lists BIOS error codes, messages, and beeps and their possible causes, table 2-3 lists error symptoms and theirpossible 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.