If POST does not detect any errors, the computer beeps once or twice to
indicate that POST has run successfully and starts (boots) from the hard
drive (or from a bootable diskette if one is installed in the diskette
drive).
If POST detects errors, the errors are indicated by screen and/or audible
messages. Refer to "Power-On Self-Test (POST) Error Messages" in this
section for a list of POST error messages, probable causes, and recommended
actions.
Run Computer Checkup after POST runs successfully (Section 2.3).
NOTE: If the system is not functioning well enough to run POST, or if the
display is not functioning well enough to show POST error messages,
refer to the troubleshooting tables in Section 2.4.
Power-On Self-Test (POST) Error Messages
Table 2-1 lists visual error messages for POST, audible (beep) error
messages, probable causes, and recommended actions.
Table 2-1. Power-On Self-Test Messages
===========================================================================
Message Beeps Probable Cause Recommended Action
===========================================================================
101 - ROM Error 1 Long, System ROM checksum 1. Inspect the ROM
1 Short invalid. placement.
2. Replace the ROM.
3. Flash the ROM.
4. Replace the system
board.
---------------------------------------------------------------------------
101 - I/0 ROM None Option ROM checksum 1. Inspect the ROM
Error invalid. placement.
2. Verify the correct
ROM.
3. Replace the ROM.
---------------------------------------------------------------------------
102 - System None Defective DMA, 1. Replace the system
Board Failure timers, etc. board.
2. Replace the processor
board.
---------------------------------------------------------------------------
162 - System 2 Short No diskette drive 1. Run Computer Setup.
Options or mismatch in 2. Check diskette cable.
Error drive type. 3. Check diskette drive.
---------------------------------------------------------------------------
162 - System 2 Short Configuration Run Computer Setup.
Options Not Set incorrect.
---------------------------------------------------------------------------
163 - Time & 2 Short Invalid time or Run Computer Setup.
Date Not Set date in
configuration
memory.
---------------------------------------------------------------------------
164 - Memory 2 Short Configuration The following steps