Power-On Self-Test (Post) - Compaq 12XL125 - Presario - K6-2 533 MHz Maintenance & Service Manual

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 clear the logo and display the POST messages as they occur.
If the Notebook does not beep, POST has successfully completed its test and has detected
no errors. POST then reboots from the hard drive or from a bootable diskette if one is
installed in the diskette drive.
However, if POST detects errors, these are indicated by messages displayed on the screen
and/or audible messages. A list of the POST error codes and what they mean is shown in
the table below.
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
Probable Cause
DMA, timers, etc.
Probable Cause
Incorrect configuration.
CMOS reflects an invalid
configuration setting.
RAM failure.
Memory test data error.
XX000YZZ RAM failure.
4 T
ROUBLESHOOTING
Presario 1200XL Series
Model XL300, XL300A, and XL300B
Tables.
Power-On Self-Test Messages
102-System Board Failure
162-System Options Not Set
Recommended Action
Replace the system board.
Recommended Action
Run Computer Setup.
Run Computer Setup.
1. Replace the memory
modules.
2. Replace the system board.
1. Replace the memory
modules.
2. Replace the system board.
Replace the system board.
P N M
RESARIO OTEBOOK AINTENANCE AND
S G 1200XL S
ERVICE UIDE ERIES