Dell Inspiron 7500 - Manual (Page 18)

To deactivate the embedded keypad, press . The Num Lock indicator is no longer illuminated.
When the embedded keypad is activated, the key combinations in Table 1 temporarily disable specific keypad keys.
Table 1. Activated Keypad Functions
To use the embedded arrow keys, ensure that is off. Press and hold and the corresponding key displayed in Table 2.
Table 2. Deactivated Keypad Functions
External Keyboard, Keypad, or Mouse
You can connect a keyboard with a standard connector to the Personal System/2 (PS/2) connector on the computer by using an adapter available
from Dell. You can use the integrated keyboard even when an external keyboard is attached to the computer. You can also connect a Universal
Serial Bus (USB) keyboard to the computer's USB connector.
Attach a PS/2 mouse to the PS/2-compatible connector on the computer (see Figure 6) or a USB-compatible mouse to the USB connector. If you
attach a USB mouse to the computer, you do not need to reboot the computer in order to use the mouse. The touch pad device drivers that Dell
installed on your hard-disk drive work with a PS/2 mouse, serial mouse, or USB mouse from Dell.
Figure 6. Attaching a PS/2 Mouse
If you did not receive your mouse from Dell, you may need to install device drivers separately to use the mouse. This software is usually included
with mouse installation kits.
Touch Pad
The PS/2-compatible touch pad detects the position of your finger over a touch-sensitive area and provides the computer full mouse functionality.
The touch pad's two buttons correspond to the left and right buttons on a standard mouse.
When Keypad Is Activated
(Number Lock Indicator ON)
Function
<key> Enables the lowercase letter or primary function of that specific key
<key> Enables the uppercase letter or shift function of that specific key
When Keypad Is Deactivated Function
Performs the same function as pressing
<7> Performs the same function as pressing
Performs the same function as pressing the down-arrow key
<8> Performs the same function as pressing the up-arrow key
Performs the same function as pressing the left-arrow key
Performs the same function as pressing the right-arrow key
<.> Performs the same function as pressing
NOTE: The embedded numeric keypad is automatically disabled if an external keyboard or keypad is connected to the computer.
NOTE: If you are using a PS/2 mouse that is not Microsoft-compatible and the mouse does not work properly, reboot the computer. If
the mouse still does not work, install the drivers from the diskette that came with the mouse and reboot the computer.