Solving Hardware Installation Problems; Solving Keyboard/Numeric Keypad Problems; Solving Memory Problems - Compaq 1650 Maintenance & Service Manual

"Compaq.com - Compaq Presario 1600 Series Maintenance and Service Guide - Models: 1650 and 1655
Hard drive error occurs.
Hard drive does not work.

Solving Hardware Installation Problems

Some common causes and solutions for hardware installation problems are listed in the following table.
Problem
A new device is not recognized as part
of the computer system.

Solving Keyboard/Numeric Keypad Problems

Some common causes and solutions for keyboard/numeric keypad problems are listed in the following table.
Problem
Embedded numeric keypad on computer
keyboard is disabled.
Embedded numeric keypad is disabled and
Num Lock function is on.

Solving Memory Problems

Some common causes and solutions for memory problems are listed in the following table.
Problem
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Hard drive has bad sectors or has
failed.
Hard drive is not seated properly.
Solving Hardware Installation Problems
Probable Cause
Cable(s) of new external device are
loose or power cables are
unplugged.
Power switch of new external device
is not turned on.
Device is not seated properly.
Solving Keyboard/Numeric Keypad Problems
Probable Cause
Num Lock function is not enabled.
External numeric keypad is
connected to the computer.
Solving Memory Problems
Probable Cause
Run Computer Checkup.
Turn off and unplug the computer,
remove the battery pack, and
remove and then reinstall the hard
drive.
Solutions(s)
Ensure that all cables are properly
and securely connected.
Turn off the computer, turn on the
external device, then turn on the
computer to integrate the device
with the computer system.
Turn off the computer and reinsert
the device.
Solution(s)
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.
Disconnect the external numeric
keypad from the computer.
Solution(s)