Acer Travelmate 4050 Service Guide

14Chapter 1
Lock Keys
The keyboard has four lock keys which you can toggle on and off.
Lock KeyDescription
Caps  Lock When Caps Lock is on, all alphabetic characters typed 
are in uppercase.
Pad lock    
(Fn-F10)When Pad Lock is on, the embedded keypad is 
enabled. In this mode the keypad is cursor function.
Num lock   
(Fn-F11)When Num Lock is on, the embedded keypad is in 
numeric mode. The keys function as a calculator 
(complete with the arithmetic operators +, -, *, and /). 
Use this mode when you...

Chapter 115
Embedded Numeric Keypad
The embedded numeric keypad functions like a desktop numeric keypad.  It is indicated by small characters 
located on the right hand side of the keycaps.
Desired AccessNum Lock OnNum Lock Off
Number keys on embedded 
keypadType numbers in a normal 
manner.
Main keyboard keys Hold  while typing 
letters on embedded 
keypad.Type the letters in a normal 
manner. 

16Chapter 1
Windows Keys
The keyboard has two keys that perform Windows-specific functions.
KeyDescription
Windows logo key Start button.  Combinations with this key perform special 
functions.  Below are a few examples:
  + Tab (Activates next taskbar button)
  +  E (Explores My Computer)
  +  F (Finds Document)
 +  M (Minimizes All)
j +   + M (Undoes Minimize All)
    + R (Displays the Run... dialog box)
Application key Opens a context menu (same as a right-click). 

Chapter 117
Hot Keys
The computer uses hotkey or key combinations to access most of the computer’s controls like sreen 
brightness and volume output.
To activate hot keys, press and hold the Fn key before pressing the other key in the hot key combination.
Hot KeyIconFunctionDescription
Fn-Esc Sleep Puts the computer in Sleep mode.
Fn-F5 Display toggle Switches display output between the display screen, 
external monitor (if connected) and both the display 
screen and external monitor.
Fn-End Speaker...

18Chapter 1
The Euro Symbol
If your keyboard layout is set to United States-International or United Kingdom or if you have a keyboard with 
a European layout, you can type the Euro symbol on your keyboard.
NOTE:  For US keyboard users: The keyboard layout is set when you first set up Windows. For the Euro 
symbol to work, the keyboard layout has to be set to United States-International. 
To verify the keyboard type in Windows 2000 and Windows Millennium Edition, follow the steps below:
1.Click on Start,...

Chapter 119
Launch Keys
Located at the top of keyboard are three buttons. The left-most button is the power button. To the right of the 
power button are the two launch keys. They are designated as the programmable buttons (P1 and P2).
Launch KeyDefault application
e Acer eManager application (User-programmable)
P User-programmableLaunch key Default application 

20Chapter 1
Touchpad
The built-in touchpad is a pointing device that senses movement on its surface. This means the cursor 
responds as you move your finger on the surface of the touchpad.  The central location on the palmrest 
provides optimum comfort and support.
Touchpad Basics
The following items teach you how to use the touchpad:
TMove your finger across the touchpad to move the cursor. 
TPress the left and right buttons located on the edge of the touchpad to do selection and execution 
functions....

Chapter 121
Hardware Specifications and Configurations
Processor
ItemSpecification
CPU type
Intel
® Pentium® M Processor at 1.4~2.1 GHz 
Intel
® Celeron® M Processor at 1.2~1.5 GHz
CPU package 
FCBGA package
CPU core voltage
Intel
® Pentium® M Processor supports automatic selection of power 
supply voltage
CPU I/O voltage 1.05V
BIOS
ItemSpecification
BIOS vendor Insyde
BIOS Version Insyde MobilePRO BIOS 4.0
BIOS ROM type Flash ROM
BIOS ROM size 512KB 
BIOS package 32 lead of PLCC
Bupported protocols ACPI...

22Chapter 1
 
NOTE: Above table lists some system memory configurations. You may combine DIMMs with various 
capacities to form other combinations.
.
. Memory Combinations
Slot 1Slot 2Total Memory
0MB 128MB 128MB
0MB 256MB 256MB
0MB 512MB 512MB
0MB 1024MB 1024MB
128MB 0MB 128MB
128MB 128MB 256MB
128MB 256MB 384MB
128MB 512MB 640MB
128MB 1024MB 1152MB
256MB 0MB 256MB
256MB 128MB 384MB
256MB 256MB 512MB
256MB 512MB 768MB
256MB 1024MB 1280MB
512MB 0MB 512MB
512MB 128MB 640MB
512MB 256MB 768MB
512MB 512MB...

Chapter 123
Hard Disc Drive Interface
ItemSpecification
Functionality
Model Name Toshiba
MK3025GASHitachi
HTS424030M9AT00Seagate
2.75”W. 37”H ST94019A
Capacity (MB) 30000 30000 40000
Bytes per sector 512 512 512
Data heads 2 2 3
Data Disks 1 1 2
Spindle speed (RPM) 4200 RPM 4200 RPM 4200 RPM
Performance Specifications
Buffer size  2MB 2MB 2048KB
Interface ATA-5 ATA-6 ATA-5
Media transfer rate (disk-
buffer, Mbytes/s, max)154.3~298.0Mbits/sec 370Mbits/sec 386Mbits/sec
Interface  transfer rate...