Maintenance and Service Guide
Compaq Presario 5400 Series
Computers - 5446, 5452, 5456, 5471, 5473, 5474, 5475, 5476, 5477
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TROUBLESHOOTING Troubleshooting Without
Diagnostics (continued)
Hardware installation |
Problem |
Probable
cause(s) |
Possible
solutions |
A new device
is not recognized
as part of the computer system. |
When the system advised
you of changes to the configuration, you did not save the changes. |
Reboot the computer and
follow the instructions for saving the changes. |
The system may not have
automatically recognized the new device. |
Run Computer Setup and identify the new device. |
The cables for the new
external device are loose, or the power cables are unplugged. |
Check all cables. |
The power switch for the
new external device is not turned on. |
Turn off the computer,
turn on the external device, and then turn on the computer to integrate the new device
with the computer. |
Power |
Problem |
Possible
Solution |
Computer will not turn
on. |
Ensure that the computer
is connected to a power source. |
Computer
does not automatically
display the date and time. |
The
real-time clock (RTC) battery may need to be replaced. Click here
for replacement procedures. |
Computer does not beep
during POST. |
The speaker volume may
have been turned down. Select the Volume option from the Control Panel and adjust
the volume. |
Computer
powered off automatically. |
The
unit temperature may have been exceeded. Check the fan for function and blockage. |
USB |
Problem |
Probable cause(s) |
Possible solution |
USB device does not work
with the system. |
The USB device and the
system may use different USB architectures. |
Ensure that the USB
device and the system share the same USB architecture. (UHCI-compliant devices will only
work with a UHCI-compliant system, and OHCI-compliant devices will only work with a
OHCI-compliant system). |
Diskette Drive |
Problem |
Probable cause(s) |
Possible solution |
Diskette drive light stays on. |
Diskette
may be damaged. |
From
the desktop click on the Start menu. Choose Program Accessories
System
Tools Scandisk to check for problems. |
Diskette
may be installed incorrectly. |
Remove
the diskette and reinsert. |
Software
program may be damaged. |
Check
the program diskettes. |
Diskette drive cannot write to a diskette. |
Diskette
is not formatted. |
Format
the diskette. |
Diskette
is write-protected. |
Either
use another diskette that is not write-protected or disable the write protection on the
diskette. |
Writing
to the wrong drive. |
Check
the drive letter in your path statement. |
Not
enough space is left on the diskette. |
Use
another diskette to write the information. |
Diskette drive cannot read a diskette. |
Diskette
is not formatted. |
Format
the diskette. |
Using
the wrong diskette type for the drive type. |
Use a
diskette that is compatible with the drive. |
Reading
the wrong drive. |
Check
the drive letter in your path statement. |
Diskette
drive has been disabled by Computer
Setup. |
Run Computer Setup and enable the diskette drive. |
SuperDisk Drive |
Problem |
Probable cause(s) |
Possible solution |
SuperDisk drive light stays on. |
Diskette
may be damaged. |
From
the desktop click on the Start menu. Choose Program Accessories
System
Tools Scandisk to check for problems. |
Diskette
may be installed incorrectly. |
Remove
the diskette and reinsert. |
Software
program may be damaged. |
Check
the program diskettes. |
SuperDisk drive cannot write to a diskette. |
Diskette
is not formatted. |
Format
the diskette. |
Diskette
is write-protected. |
Either
use another diskette that is not write-protected or disable the write protection on the
diskette. |
Writing
to the wrong drive. |
Check
the drive letter in your path statement. |
Not
enough space is left on the diskette. |
Use
another diskette to write the information. |
SuperDisk drive cannot read a diskette. |
Diskette
is not formatted. |
Format
the diskette. |
Using
the wrong diskette type for the drive type. |
Use a
diskette that is compatible with the drive. |
Reading
the wrong drive. |
Check
the drive letter in your path statement. |
Diskette
drive has been disabled by Computer
Setup. |
Run Computer Setup and enable the diskette drive. |
VGA Monitor |
Problem |
Probable cause(s) |
Possible solution |
Characters are
dim. |
The brightness control
is not set properly. |
Adjust the brightness
control. |
Screen is blank. |
A
screen-blanking utility could be installed. |
Press
any key. If the display reappears, you have a screen-blanking utility installed. |
The
brightness needs adjusting. |
Adjust
the brightness control. |
Screen
save has been initiated. |
Press
any key or move the mouse to light the screen. |
Garbled
characters on the screen
are mixed with text. |
The ANSI.SYS driver is
not in the CONFIG.SYS file. |
Add the ANSI.SYS driver
to the CONFIG.SYS file by adding the following line: DEVICE = C:\ANSI.SYS |
Monitor overheats. |
There
is not enough ventilation space for proper airflow. |
Leave
at least 3 inches (7.6 cm) of ventilation space. Also, be sure there is nothing on top of
the monitor to obstruct air flow. |
Cursor
will not move using the
arrow keys on the numeric keypad. |
The Num Lock key
is on. |
Press the Num Lock
key. The Num Lock light should not be on when you want to use the arrow keys. |
There is a possible
application error. |
Restart the computer. |
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