Solving Keyboard/Numeric Keypad Problems; Solving Memory Problems - Compaq 1600XL Maintenance & Service Manual

Model 1600T, 1600-XL140, 1600-XL141, 1600-XL142, 1600-XL143, 1600-XL144,
1600-XL146, 1600-XL147, 1600-XL150 XL156, XL157, XL255, XL256, XL257, and XL258

Solving Keyboard/Numeric Keypad Problems

Some common causes and solutions for keyboard/numeric keypad problems are listed in
the following table.
Problem
Embedded numberic
keypad on notebook
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
Memory count during
Power-On Self-Test
(POST) is incorrect.
"Out of Memory"
message is displayed
on the screen or
insufficient memory
error occurs during
operation.
P N M
RESARIO OTEBOOK AINTENANCE AND
Presario 1600XL Series
Solving Keyboard/Numeric Keypad Problems
Probable Cause
Num Lock function is not
enabled.
External numeric keypad is
connected to the notebook.
Solving Memory Problems
Probable Cause
Optional memory expansion
card is installed incorrectly, is
incompatible with the
computer, or is defective.
System ran out of memory for
the application.
Too many TSR (terminate-
and-stay-resident)
applications are running.
S G 1600XL S
ERVICE UIDE
Solution(s)
Press the Shift+NumLk keys to
enable the Num Lock function and
embedded numberic keypad. The
Num Lock light on the notebook
turns on.
Disconnect the external numeric
keypad from the notebook.
Solution(s)
Ensure that the optional memory
expansion card is installed
correctly.
Check the application
documentation for memory
requirements.
If necessary, install additional
memory.
Remove from memory any TSR
applications that you do not need.
ERIES
T 31
ROUBLESHOOTING