Compaq 12XL500 Models XL300, XL300A, and XL300B - Maintenance & Service Gu - Page 38

Troubleshooting, Preliminary Steps - power on password

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Presario 1200XL Series Model XL300, XL300A, and XL300B Troubleshooting This section provides troubleshooting information for Compaq Presario 1200XL Series Portable Notebook. The basic steps in troubleshooting are: 1. Preliminary Steps 2. The Power-On Self-Test (POST) 3. The recommended actions you can take, described in the diagnostic tables later in this section, if you are unable to run POST, or if POST displays an error message. When following the recommended actions for on Power-On Self-Test and Diagnostic Error Codes, perform the steps in the order listed above. Rerun POST after each recommended action until the problem is solved, and if no error message occurs. Once the problem is solved, do not continue with any remaining recommended actions. Note: If the problem is intermittent, check your Notebook several times to ensure that the problem is solved. Preliminary Steps Before running Power-On Self-Test (POST), complete the following steps: 1. If a Power-on password is established, type it and press the Enter key. If you do not know the password, clear the password (See Clearing the Power-On Password). 2. Run Compaq Diagnostics. 3. Turn off the Notebook and its external devices. 4. Disconnect any external devices you do not want to test. Do not disconnect the printer if you want to test it or use it to log error messages. Important: If the problem only occurs when an external device is connected to the computer, the problem may be related to the external device or its cable. Verify this by running POST both with and without the external device connected. 5. Install loopback plugs in the serial and parallel connectors if you want to test these ports. 6. Ensure that the hard drive is installed in the Notebook. PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1200XL SERIES TROUBLESHOOTING 1

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P
RESARIO
N
OTEBOOK
M
AINTENANCE
AND
S
ERVICE
G
UIDE
1200XL S
ERIES
T
ROUBLESHOOTING
1
Presario 1200XL Series
Model XL300, XL300A, and XL300B
Troubleshooting
This section provides troubleshooting information for Compaq Presario 1200XL Series
Portable Notebook. The basic steps in troubleshooting are:
1.
Preliminary Steps
2.
The Power-On Self-Test (POST)
3.
The recommended actions you can take, described in the diagnostic tables later in this
section, if you are unable to run POST, or if POST displays an error message.
When following the recommended actions for on
Power-On Self-Test
and
Diagnostic Error
Codes
, perform the steps in the order listed above. Rerun POST after each recommended
action until the problem is solved, and if no error message occurs. Once the problem is
solved, do not continue with any remaining recommended actions.
Note:
If the problem is intermittent, check your Notebook several times to ensure that
the problem is solved.
Preliminary Steps
Before running
Power-On Self-Test (POST)
, complete the following steps:
1.
If a Power-on password is established, type it and press the
Enter
key. If you do not
know the password, clear the password (See
Clearing the Power-On Password
).
2. Run
Compaq Diagnostics
.
3.
Turn off the Notebook and its external devices.
4.
Disconnect any external devices you do not want to test. Do not disconnect the printer
if you want to test it or use it to log error messages.
Important:
If the problem only occurs when an external device is connected to the
computer, the problem may be related to the external device or its cable. Verify this by
running POST both with and without the external device connected.
5.
Install loopback plugs in the serial and parallel connectors if you want to test these
ports.
6.
Ensure that the hard drive is installed in the Notebook.