compaq lte 5000 User Manual

							display open.
4. Turn off the computer and all external devices.
5. Disconnect any external devices that you do not want to test. If you
want to use the printer to log error messages, leave it connected to
the computer.
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.
6. Use Advanced Diagnostics and loopback plugs in the serial and parallel
connectors if you plan to test these ports. To run Advanced
Diagnostics, complete the following steps:
a. Insert the Diagnostics diskette into the diskette drive and turn on
the computer.
b. At the Welcome Screen, press Ctrl + A.
c. Press Enter to accept OK.
d. Select Computer Checkup (TEST).
e. Select Prompted Diagnostics after Identifying System Hardware
completes.
f. Select Interactive Testing and follow the displayed instructions.
Refer to Chapter 3 for description and spare part number for the loopback
plugs.
7. Ensure that the primary hard drive is installed in the computer.
8. Ensure that the battery pack is installed in the computer and the AC
Adapter is connected to the computer and plugged into an AC power
source.
After completing the preliminary steps, run POST (Section 2.4) and
Computer Checkup (Section 2.5).
Chapter 2.2 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 and replace a jumper on the
system board. If you do not know the passwords, use the following
procedure to clear the password:
1. Complete the preparation for disassembly procedures in Section 5.3.
2. Remove the CPU cover as described in Section 5.5. 
						

							3. Move the jumper on JP1 (Figure 2-1) from pins 2 and 3 to pins 1 and 2.
4. Turn on the computer and run POST.
5. Turn off the computer and move the JP1 jumper to pins 2 and 3 for
normal operation.
Chapter 2.3 Running Computer Setup 
The ROM-based Computer Setup displays the current system configuration and
allows you to set system and power management parameters. These parameters
are stored in CMOS, and a backup copy is saved in a parameter block in
system flash ROM.
You can access Computer Setup by pressing F10 when the prompt appears
after you turn on or restart the computer. The following configuration
parameters can be changed in Computer Setup:
o Date and time
o Power conservation (when) 
						

							o Power conservation (level)
o PC Card slot power management
o Hibernation on/off
o Hibernation settings
o Warning beep
o Setup password
o Diskette drive disable
o Serial/IrDA ports disable
o Parallel port disable
o PC Card slots disable
o Resume password on/off
o Boot memory test
o Keyboard numlock
o Boot sequence
o Boot display
o Serial port settings
o Infrared port settings
o Parallel port settings
o Power-on password
o Diskette drive boot disable
o NTSC/PAL
o Windows 95 Power Properties
o Lid closure notification
o Advanced LPT mode
Computer Setup automatically recognizes and configures the system for new
Compaq devices. It does this without prompting you for information about
the devices. However, if you add a memory expansion board, the next time
you turn on the computer a prompt appears notifying you of the new memory
configuration.
The first Computer Setup screen displays current settings for the system,
ports, and devices. The status bar at the bottom of the screen gives
instructions for navigating and choosing options. The status bar also
displays descriptions as you highlight menus and menu options. 
						

							NOTE: If the main system board is replaced, the serial number on this
screen changes to 0 (zero).
Select one of the menus from the menu bar at the top of the screen to view
or to change the following configuration settings:
o Initialization startup preferences
o Ports, including serial/infrared, parallel, Ethernet, and MPEG
o Power, including Power Management and Hibernation
o Security, including setup and power-on passwords and disabling devices
2.3.1 Initialization Menu
Select the Initialization menu to set the date and time and to change the
initialization (startup) settings for running the POST memory tests,
numlock on or off, the drive boot sequence, boot display, and lid closure
notification.
NOTE: The boot sequence sets the order in which the system searches for a
bootable drive to start the computer. Before changing the booting
sequence, see The Hard Drive Boot Sequence in Appendix C for more
information.
2.3.2 Ports Menu
Select the Ports menu to change the default input/output (I/O) addresses
and interrupt requests (IRQs) for serial/infrared, parallel, and Ethernet
ports, select PAL or NTSC for the optional MPEG video format, and enable
Advanced LPT mode.
NOTE: If you select conflicting settings for the ports, the system
automatically changes one of the settings.
2.3.3 Power Menu
Select the Power menu to enable or disable Power Management, PC Card slot
power management (not available on LTE 5000, LTE 5100, and LTE 5200
models), low-battery warning beeps, and an external energy saving monitor.
The factory default settings are:
o Power Management Enabled While on Battery
o Conservation Level Medium
o Low-Battery Warning Beeps Enabled
o External Energy Saving Monitor Disabled 
						

							o PC Card Power Off During Standby
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION >>>>>
						

							o Off - Turns off all power management. The power management icon on the
status panel turns off.
NOTE: You can also temporarily toggle power management off and on by
pressing the Fn+F7 hotkeys. The next time you restart the computer,
the Power Properties setting takes effect.
2.3.4 Security Menu
Select the Security menu to set, change, or delete the setup and power-on
passwords, and to enable/disable QuickLock/QuickBlank, power-on password
from Standby, diskette drives, ports, and PC Card slots.
Setup Password
Use the Setup password to protect the system configuration from
unauthorized changes. After you establish the setup password, you cannot
change the system configuration until you enter the setup password.
IMPORTANT: Type carefully because the password does not display as you
type it. If you choose to, you can use the same password for
setup and for power-on.
The next time you press F10 (after POST) to run Computer Setup, a password
prompt appears on the screen. If you enter the password incorrectly, you
are prompted to reenter the password.
If you forget your setup password, you cannot change the system
configuration until the computer memory is cleared of the password.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION >>>>>
						

							If you forget your power-on password, you cannot use the computer until
the computer memory is cleared of the password.
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> CAUTION >>>>>
						

							This chapter contains typical error messages that you may encounter during
the power-on self-test (POST). POST is a series of tests that run every
time you turn on the computer. POST verifies that the system is configured
and functioning properly. A successful POST is followed by one or two
short beeps.
If you receive an error message listed below, follow the recommended
action. If you receive an error message that is not listed, contact your
Compaq authorized service provider. You may also want to run Computer
Checkup from the Diagnostics diskette. Information about running Computer
Checkup is presented later in this section.
If POST detects an error, one of the following events occurs:
o A message with the prefix WARNING appears informing you where the
error occurred. The system pauses until you press F1 to continue.
o A message with the prefix FATAL appears informing you where the error
occurred. After the message, the system emits a series of audible beeps.
The system then stops.
o The system emits a series of audible beeps. The system then stops.
Warning messages indicate a potential problem exists such as a system
configuration error. When F1 is pressed, the system should resume. You
should be able to correct problems that produce WARNING messages.
IMPORTANT: When a WARNING message includes the prompt to RUN SCU, run
Computer Setup. (Computer Setup replaces the SCU utility.)
Fatal errors emit a beep and may display a FATAL message. Fatal errors
indicate severe problems, such as a hardware failure. Fatal errors do not
allow the system to resume. Some of the Fatal error beep codes are listed
at the end of this section.
Table 2-1. Warning Messages
===========================================================================
Message Description
===========================================================================
Clock not ticking correctly The real time clock is not ticking.
---------------------------------------------------------------------------
CMOS checksum invalid, run CMOS RAM information has been corrupted and
SCU needs to be reinitialized by running Computer
Setup.
---------------------------------------------------------------------------
CMOS failure, run SCU CMOS RAM has lost power and needs to be
reinitialized by running Computer Setup.
---------------------------------------------------------------------------
Floppy controller failed The diskette drive controller failed to
respond to the reset command. Power down the
system and check all appropriate connections.
If the diskette drive controller continues to
fail, you may need to replace the system
board.
--------------------------------------------------------------------------- 
						

							Floppy disk track 0 failed The diskette drive cannot read track 0 of the
diskette in the drive. Try another diskette.
If the problem persists, you may need to
replace the diskette drive.
---------------------------------------------------------------------------
Floppy information invalid, The drive parameters stored in CMOS RAM do
run SCU not match the diskette drives detected in the
system.
---------------------------------------------------------------------------
Hard disk controller error The hard drive controller failed to respond
to the reset command. Check the drive
parameters. Power down the system and check
all appropriate connections.
---------------------------------------------------------------------------
Hardware information does The video adapter type specified in CMOS RAM
not match video card, run does not match the installed hardware.
SCU
---------------------------------------------------------------------------
Keyboard controller failure The keyboard failed the self-test command.
---------------------------------------------------------------------------
Keyboard failure The keyboard failed to respond to the RESET
ID command.
---------------------------------------------------------------------------
No interrupts from Timer 0 The periodic timer interrupt is not
occurring.
---------------------------------------------------------------------------
RAM parity error at A RAM parity error occurred at the specified
location xxxx (hex) location.
---------------------------------------------------------------------------
ROM at xxxx (LENGTH yyyy) An illegal adapter ROM was located at the
with nonzero checksum (zz) specified address. An external adapter (such
as a video card) may be causing the conflict.
---------------------------------------------------------------------------
Time/Date corrupt - run SCU The time and date stored in the real time
clock have been corrupted, possibly by a
power loss.
---------------------------------------------------------------------------
Unexpected amount of The amount of memory detected by POST does
memory, run SCU not match the amount specified in CMOS RAM.
---------------------------------------------------------------------------
Hard disk xx failure A failure or an error occurred when trying to
(or error) access the hard drive.
===========================================================================
Table 2-2. Fatal Error Messages
===========================================================================
Message Description Beep Code
===========================================================================
CMOS RAM test failed A walking bit test of CMOS RAM 3
location 0E (Hex) - 3F (Hex) failed.
---------------------------------------------------------------------------
DMA controller faulty A sequential read/write of the 4
transfer count and transfer address
registers within the primary and
secondary DMA controllers failed.
---------------------------------------------------------------------------
Faulty DMA page A walking bit read/write of the 16 DMA 0
registers controller page registers starting at
location 80 Hex failed.
--------------------------------------------------------------------------- 
						

							Faulty refresh A continuous read/write test of port 1
circuits 61h found that bit 4 (Refresh Detect)
failed to toggle within an allotted
amount of time.
---------------------------------------------------------------------------
Interrupt controller A sequential read/write of various 5
failed Interrupt Controller registers failed.
---------------------------------------------------------------------------
ROM checksum incorrect A checksum of the ROM BIOS does not 2
match the byte value at F000:FFFF.
---------------------------------------------------------------------------
RAM error at location RAM error occurred during memory test. None
xxxx
---------------------------------------------------------------------------
Parity error at Parity error occurred. None
unknown location
===========================================================================
The following table lists some of the Fatal Error beep codes, along with
the beep sequence (short, long, pause) and the meaning of the beeps.
Table 2-3. Fatal Error Beep Codes
===========================================================================
Beep Code Beep Sequence Explanation Remedy
===========================================================================
0 S-S-S-P-S-S-L-P The DMA page Replace system board.
registers are faulty.
1 S-S-S-P-S-L-S-P The refresh circuitry Replace system board.
is faulty.
2 S-S-S-P-S-L-L-P The ROM checksum is 1. Flash the ROM
incorrect. 2. Replace system
board.
3 S-S-S-P-L-S-S-P The CMOS RAM test Replace system board.
failed.
4 S-S-S-P-L-S-L-P The DMA controller is Replace system board.
faulty.
5 S-S-S-P-L-L-S-P The interrupt Replace system board.
controller failed.
6 S-S-S-P-L-L-L-P The keyboard Replace system board.
controller failed.
7 S-S-L-P-S-S-S-P Graphics adapter is Replace system board.
faulty.
8 S-S-L-P-S-S-L-P Internal RAM is Replace processor
faulty. board.
---------------------------------------------------------------------------
S = Short, L = Long, P = Pause
===========================================================================