Preliminary Steps - Compaq 1200US - Presario - Celeron 800 MHz Maintenance And Service Manual

Models: 1246, 1247, 1277, 1278, and 1279
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Troubleshooting

Preliminary Steps

Preliminary
Steps
Clearing the
Power-On
Password
Power-On Self
Test (POST)
Compaq
Diagnostics
Diagnostic Error
Codes
Troubleshooting
Without
Diagnostics
Solving Minor
Problems
Contacting
Compaq
Support
Maintenance & Service Guide
Presario Series
| Notice | Preface
| Removal & Replacement Procedures
Pin Assignments
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,
2. Run Computer Checkup.
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:
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 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 the hard drive is installed in the computer.
7. 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.
| Product Description
| Battery Pack Operations
| Troubleshooting
| Specifications
clear the password .