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United States January 2, 2003
Maintenance & Service Guide
Presario 1600 Series Portable Computers
Notice | Preface | Home | Product Description | Troubleshooting | Illustrated Parts Catalog
Removal & Replacement Procedures | Specifications | Connector Pin Assignments | Battery Pack
Diagnostic
Preliminary Steps
Before running POST, complete the following preliminary steps:
1. If a power-on password has been established, type the password and press
the Enter key. If the password is not known,
clear the password.
2. Run Computer Setup.
3. Adjust the brightness and contrast.
4. Turn off the computer and its external devices.
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.
NOTE:
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 with and without the external device connected.
6. Install loopback plugs in the serial and parallel connectors if you would like
to test these ports.
7. Ensure the hard drive is installed in the computer.
8. Ensure that the battery pack is inserted in the computer and the computer
is connected to an external AC power source.
When the preliminary steps are completed, you are ready to run
POST.
Clearing the Power-On Password
Clearing the power-on password requires removing all Setup attributes that
are programmed in the CMOS. If the password is not known, clear it by
performing the following steps:
1. Turn off the computer.
2. Disconnect the power cord.
3.
Remove the battery pack.
4. Remove the keyboard.
5. Remove the RTC battery (1) for 30 seconds as shown below. The
password, together with other Setup attributes, will be cleared.
Clearing the Power-On Password
6. Turn the computer on to verify the power-on password has been cleared.
If it has not been cleared, repeat these steps.
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