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"Compaq.com - Compaq Presario Series Maintenance and Service Guide - Models: 1683, 1685, 1687, 1688, and 1690
Reading hard drive takes an
unusually long time after restarting
the computer.
System entered Hibernation due to
low battery condition and is now
exiting from it.
Give the system time to restore the
previously saved data to its exact
state before Hibernation.
Hard drive error occurs. Hard drive has bad sectors or has
failed.
Run Computer Checkup.
Hard drive does not work. Hard drive is not seated properly. Turn off and unplug the computer,
remove the battery pack, and
remove and then reinstall the hard
drive.
Solving Hardware Installation Problems
Some common causes and solutions for hardware installation problems are listed in the following table.
Solving Hardware Installation Problems
Problem Probable Cause Solutions(s)
A new device is not recognized as part
of the computer system.
Cable(s) of new external device are
loose or power cables are
unplugged.
Ensure that all cables are properly
and securely connected.
Power switch of new external device
is not turned on.
Turn off the computer, turn on the
external device, then turn on the
computer to integrate the device
with the computer system.
Device is not seated properly. Turn off the computer and reinsert
the device.
Solving Keyboard/Numeric Keypad Problems
Some common causes and solutions for keyboard/numeric keypad problems are listed in the following table.
Solving Keyboard/Numeric Keypad Problems
Problem Probable Cause Solution(s)
Embedded numeric keypad on computer
keyboard is disabled.
Num Lock function is not enabled. Press the Shift+NumLk keys to
enable the Num Lock function
and embedded numeric keypad.
The Num Lock icon on the status
panel turns on.
Embedded numeric keypad is disabled
and Num Lock function is on.
External numeric keypad is
connected to the computer.
Disconnect the external numeric
keypad from the computer.
Solving Memory Problems
Some common causes and solutions for memory problems are listed in the following table.
Solving Memory Problems
Problem Probable Cause Solution(s)
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