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4 T
ROUBLESHOOTING
P
RESARIO
N
OTEBOOK
M
AINTENANCE
AND
S
ERVICE
G
UIDE
1800 S
ERIES
Presario 1800/1800T Series
Models: XL280, XL380, XL381,
and XL390
Power-On Self-Test (POST)
To run POST, complete these steps:
Turn off the Notebook, then turn it on again. As soon as the Compaq logo appears, press
the ESC key to display the POST messages as they occur. Remember any POST error codes
that are displayed.
If the Notebook does not beep, POST has successfully completed its test and detected no
errors. The Notebook will automatically restart.
Note: If a bootable diskette is installed in the diskette drive, the system will boot from
the diskette instead of the hard drive.
However, if POST detects errors, the Notebook will beep and/or display a text message.
Note: If the Notebook is not functioning well enough to complete POST, or the display is
unable to show POST error messages, refer to the section Solving Minor Problems
later
in this chapter.
POST Error Messages
A list of the POST error codes and their descriptions is shown in the tables below.
102-System Board Failure
Probable Cause Recommended Action
DMA, timers, and so on Replace the system board
.
162–System Options Not Set
Probable Cause Recommended Action
Incorrect configuration Run Setup.
CMOS reflects an invalid
configuration setting.
Run Setup.
RAM failure
1. Replace the memory
modules.
2. Replace the system board
.
Memory test data error
1. Replace the memory
modules.
2. Replace the system board
.