compaq contura 400 family User Manual

							4. Remove the battery door from the docking base (Figure 3-194). 
						

							5. To replace the battery door, reverse the previous steps.
Replacing the Docking Base Feet
To replace the docking base feet, follow these steps:
1. Remove the top layer from the foot to expose the adhesive strip
(Figure 3-195).
2. Place the foot adhesive-side down into the circular indentation on the
bottom of the docking base (Figure 3-195). 
						

							Replacing the Handle
To replace the docking base handle, follow these steps:
1. Using a Torx T8, remove the screw from the rear of the handle
(Figure 3-196). 
						

							2. Slide the handle off the crankshaft (Figure 3-197). 
						

							3. Slide the new handle on the crankshaft until the handle seats.
4. To secure the new handle to the crankshaft, replace the screw behind
the handle.
Chapter 3.31 Monitor Support Cover 
This section contains replacement procedures for the foot on the monitor
support cover.
To replace the foot, follow these steps:
1. Turn the monitor support cover top-side down.
2. Remove the top layer from the foot to expose the adhesive strip
(Figure 3-198).
3. Position the foot adhesive-side down on the exposed metal and press
(Figure 3-198). 
						

							Chapter 4. Running POST and Test 
 
Introduction 
This chapter covers troubleshooting information for the computer. The
basic steps in troubleshooting include:
1. Follow the preliminary steps listed in Section 4.1.
2. Run the Power-On Self-Test (POST) as described in Section 4.2.
3. Run Computer Checkup (TEST) as described in Section 4.3.
4. Follow the recommended action described in the diagnostic tables in
Chapter 5, Section 5.1, 5.2, and 5.3 if you are unable to run POST or
Computer Checkup, or if the problem still persists after they are run.
When taking the recommended actions given in Section 5.2, 5.3, and 5.4,
take them one at a time in the given order until the problem is solved and
no error messages occur. Refer to Chapter 3 for any recommended removal
and replacement procedures.
NOTE: If a problem only occurs when an external device is connected to the
computer, the problem may be with the external device or its cable.
Verify this by running POST with and without the external device
connected.
Chapter 4.1 Preliminary Steps 
IMPORTANT: Use AC power when running POST, Computer Setup, and Computer
Checkup. A low battery condition could initiate Standby and
interrupt the program.
Before running POST and Computer Checkup, complete the following
preliminary steps:
1. If a power-on password has been established, type the password and
press the Enter key.
NOTE: If the key symbol (ohm) appears on the screen when the computer is
turned on, a power-on password has been established. If the password
is unknown, it must be cleared (refer to Clearing the Power-On
Password in this chapter).
2. Verify that Computer Setup has been run. If not, run Computer Setup.
3. Simultaneously press the Fn+F9 keys to adjust the brightness and the
Fn+F8 keys to adjust contrast on the MSTN and CSTN displays.
4. Turn off the computer and external devices. 
						

							5. 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.)
6. Install loopback and terminating plugs in the serial and parallel
connectors if you would like to test these ports.
7. Ensure that the hard drive is installed in the computer.
8. Connect the computer to an external AC power source with the battery
pack inserted.
When the preliminary steps are complete, you are ready to run POST
(Section 4.2.) and Computer Checkup (Section 4.3).
Clearing the Power-on Password
IMPORTANT: Clearing the power-on password also clears the setup password
and the CMOS that contains configuration information for all
external devices. After clearing the power-on password, reset
the setup password and run Computer Setup to restore the
configuration information.
If the password is unknown, clear it by completing the following steps:
1. Turn off the computer by simultaneously pressing the left Ctrl+Alt keys
and power button.
2. Disconnect the power cord.
3. Remove the battery pack (Section 3.2).
4. Remove the keyboard cover (Section 3.7).
5. Disable the power-on password by removing the real-time clock battery
as referenced in the following removal procedures:
- Section 3.9, Real-Time Clock Battery for Models 400 and 410
- Section 3.10, Real-Time Clock Battery for Models 420 and 430
6. Short the real-time clock battery terminals in the processor board by
touching the battery terminals with two ends of a wire.
7. Replace all components.
IMPORTANT: Ensure that the battery pack is charged, since a low battery
condition could initiate Hibernation and interrupt the
procedure.
8. Replace the battery pack (Section 3.2). 
						

							9. Connect the power cord (Section 3.2).
10. Connect the power cord to the external outlet.
11. Turn on the computer by pressing the power button.
12. Verify that the power-on password has been cleared. If it has not been
cleared, repeat steps 1 through 7. If the password is still not
cleared refer to the following section for removal procedures.
- Section 3.15, System Board for Models 400, 410, 420 and 430
13. Run Computer Setup to reconfigure the system.
Chapter 4.2 Power-On Self-Test (POST) 
The Power-On Self-Test (POST) is a series of diagnostic tests that run
automatically when the system is turned on. POST detects which type of
mass storage devices are installed in the computer and checks that the
following assemblies are functioning properly:
o System board
o Processor board
o Memory expansion board
o Internal keyboard controller (self-test, report error if failed)
o External keyboard (self-test, report error if failed)
o Display
o Video controller circuitry
o Trackball assembly (identifies the trackball, but no actual test)
o Hard drive
o Diskette drive
o System memory
Running POST
To run POST, complete the following steps:
1. Turn off the computer by simultaneously pressing the left Ctrl+Alt keys
and power button.
2. Turn on the computer.
- If POST does not detect any errors, the computer beeps one or two
times to indicate that POST has successfully run, and the computer 
						

							boots from the hard drive (or from a bootable diskette if installed
in the diskette drive). However, diskette drive may be disabled, and
the computer cannot boot from the diskette drive.
- If POST detects errors, the errors are indicated by screen and/or
audible messages. Refer to Power-On Self-Test (POST) Error
Messages in this section for a list of POST error messages, probable
causes, and recommended actions.
3. Take the recommended action for each error code, then repeat steps 1
and 2 until POST runs successfully.
After POST runs successfully, run Computer Checkup (Section 4.3).
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 tables in Section 5.4. Take the
recommended actions, then repeat steps 1 and 2 until POST runs
successfully.
Chapter 4.3 Computer Checkup (TEST) 
After POST runs successfully, run the latest version of Computer Checkup
(TEST). Computer Checkup determines if the computer assemblies and options
are recognized by the system and functioning properly. Run Computer
Checkup after installing or connecting a new assembly or option.
Computer Checkup is installed on the hard drive. If the hard drive is
nonfunctional, you can run it from a diskette.
NOTE: It is recommended that you make diskette copies of Computer Checkup
and keep them available for future need. A current copy can be
obtained from the Compaq Customer Support Center.
Running Computer Checkup
To run Computer Checkup from the hard drive, complete the following steps:
1. Turn off the computer by simultaneously pressing the left Ctrl+Alt keys
and power button.
2. Turn on the computer.
3. When the cursor moves to the right side of the screen, press F10.
The Configuration and Diagnostics menu is displayed.
4. From the Configuration and Diagnostics menu, select Computer Checkup
(TEST).
A test option menu is displayed.