Compaq 1592DMT Compaq Armada 1500 Family of Personal Computers Maintenance and - Page 30

Clearing the Power-On and Setup Passwords, Restart the computer. During the Power-On Self Test POST

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NOTE: If a problem only occurs when an external device is connected to the computer, the problem could be with the external device or its cable. Isolate the problem by running POST with and without the external device connected. 10. Use Advanced Diagnostics and loopback plugs in the serial and parallel connectors if you plan to test these ports. You may run Advanced Diagnostics from the hard drive or from a diskette. If you are running Diagnostics from the hard drive, complete the following steps: a. Turn on or restart the computer. b. Press F10 when the cursor appears in the upper right corner of the screen. If you do not press F10 in time, restart the computer and try again. The Welcome screen appears. If you are running Diagnostics from a diskette, complete the following steps: a. Insert the Diagnostics diskette into the diskette drive and turn on the computer. b. At the Welcome Screen, press Enter to accept OK. c. Select Computer Checkup (TEST). d. Select Prompted Diagnostics after "Identifying System Hardware" completes. e. Select Interactive Testing and follow the displayed instructions. Refer to Chapter 4 for the description and spare part number of the loopback plugs. After completing the preliminary steps, run POST (Section 3.3) and Computer Checkup (Section 3.5). 3.2 Clearing the Power-On and Setup Passwords The power-on password prevents use of the computer until the password is entered. The setup password prevents unauthorized changes to Computer Setup. To clear the passwords, you must remove all power from the system board. If you do not know the passwords, use the following procedure to clear the password: 1. Remove all battery packs from the battery bay and DualBay, if applicable. 2. Disconnect the AC power. 3. Remove the real time clock battery. 4. Wait five minutes. 5. Reconnect the AC power. 6. Restart the computer. During the Power-On Self Test (POST), a "162 System Options not Set" message appears. (See Section 3.4 for additional POST error messages). 7. Shut down the computer, then turn off the power again. Troubleshooting 3-3

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Troubleshooting
3-3
NOTE:
If a problem only occurs when an external device is connected to the computer,
the problem could be with the external device or its cable. Isolate the problem by
running POST with and without the external device connected.
10. Use Advanced Diagnostics and loopback plugs in the serial and parallel connectors
if you plan to test these ports. You may run Advanced Diagnostics from the hard
drive or from a diskette.
If you are running Diagnostics from the hard drive, complete the following steps:
a.
Turn on or restart the computer.
b. Press
F10
when the cursor appears in the upper right corner of the screen. If you
do not press
F10
in time, restart the computer and try again. The Welcome screen
appears.
If you are running Diagnostics from a diskette, complete the following steps:
a.
Insert the Diagnostics diskette into the diskette drive and turn on the computer.
b.
At the Welcome Screen, press
Enter
to accept
OK.
c.
Select Computer Checkup (TEST).
d.
Select Prompted Diagnostics after "Identifying System Hardware" completes.
e.
Select Interactive Testing and follow the displayed instructions.
Refer to Chapter 4 for the description and spare part number of the loopback plugs.
After completing the preliminary steps, run POST (Section 3.3) and Computer Checkup
(Section 3.5).
3.2
Clearing the Power-On and Setup Passwords
The power-on password prevents use of the computer until the password is entered. The
setup password prevents unauthorized changes to Computer Setup. To clear the
passwords, you must remove all power from the system board. If you do not know the
passwords, use the following procedure to clear the password:
1.
Remove all battery packs from the battery bay and DualBay, if applicable.
2.
Disconnect the AC power.
3.
Remove the real time clock battery.
4.
Wait five minutes.
5.
Reconnect the AC power.
6.
Restart the computer. During the Power-On Self Test (POST), a "162 System
Options not Set" message appears. (See Section 3.4 for additional POST error
messages).
7.
Shut down the computer, then turn off the power again.