Troubleshooting; Preliminary Steps - Compaq 1600XL Maintenance & Service Manual

Model 1600T, 1600-XL140, 1600-XL141, 1600-XL142, 1600-XL143, 1600-XL144,
1600-XL146, 1600-XL147, 1600-XL150 XL156, XL157, XL255, XL256, XL257, and XL258

Troubleshooting

This section provides troubleshooting information for Compaq Presario 1600XL Series
Portable Notebook. The basic steps in troubleshooting include:
1.

Preliminary Steps

2. The Power-On Self Test (POST)
3. The recommended actions described in the diagnostic tables in case you are unable to
run POST, or if POST displays an error message.
When following the recommended actions in the Sections on
and Diagnostic Error
each recommended action until the problem is solved, and if no error message occurs.
Once the problem is solved, do not continue with any recommended actions remaining.
Note: If the problem is intermittent, check your computer several times to verify that
the problem is solved.
Preliminary Steps
Before running Power-On Self Test
1. If a Power-on password is established, type the password and press the Enter key. If
you do not know the password, clear the password (See
Password).
2. Run Compaq Diagnostics.
3. Turn off the computer and its external devices.
4. Disconnect any external devices that 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 would like to test
these ports.
6. Ensure that the hard drive is installed in the Notebook.
P N M
RESARIO OTEBOOK AINTENANCE AND
Presario 1600XL Series
Codes, perform the steps in the order listed above. Rerun POST after
(POST), complete the following steps:
S G 1600XL S
ERVICE UIDE
Power-On Self Test (POST)
Clearing the Power-On
ERIES
T 1
ROUBLESHOOTING