Solving computer problems

 

 

Message

Cause and action

 

 

1801: Attached docking

The computer is attached to a docking station that is not supported by

station is not supported

ThinkPad A21e. Shut down the system and detach it from the docking

– shut down computer

station.

and remove from

 

docking station

 

 

 

The power-on password

A power-on password or a supervisor password is set. Type the password

prompt appears.

and press Enter to use the computer. If the power-on password is not

 

accepted, a supervisor password may have been set. Type the supervisor

 

password and press Enter. If you still see the same error message, have the

 

computer serviced.

 

 

The hard disk password

A hard disk password is set. To use the computer, type the password and

prompt appears.

press Enter. If you still see the same error message, have the computer

 

serviced.

 

 

The DOS full-screen

If you use a DOS application that supports only 640x480 resolution (VGA

looks smaller.

mode), the screen image may look slightly distorted or may appear smaller

 

than the display size. This is to maintain compatibility with other DOS

 

applications. To expand the screen image to the same size as the actual

 

screen, start the ThinkPad Configuration Program and click LCD; then select

 

the Screen expansion function. (The image may still look slightly distorted.)

 

Note: If your computer has screen expansion function, you can use the

 

Fn+F8 keys to expand the screen image.

 

 

Hibernation error

The system configuration changed between the time your computer entered

 

hibernation mode and the time it left this mode, and your computer cannot

 

resume normal operation.

 

v Restore the system configuration to what it was before your computer

 

entered hibernation mode.

 

v If the memory size has been changed, re-create the hibernation file.

Operating system not

Verify the following:

found.

v The hard disk drive is correctly installed.

 

v A startable diskette is in the diskette drive

 

If you still see the same error message, check the boot sequence, using the

 

BIOS Setup Utility.

 

 

Fan error

The cooling fan is failing. Have the computer serviced.

 

 

EMM386 Not Installed—

Edit C:\CONFIG.SYS and change a line from

Unable to SET Page

device=C:\WINDOWS\EMM386.EXE RAM

Frame Base Address

 

 

to

 

device=C:\WINDOWS\EMM386.EXE NOEMS

 

and save this file.

 

 

Chapter 2. Solving computer problems 13

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IBM A21e manual Solving computer problems

A21e specifications

The IBM A21e is a notable entry in the realm of Lenovo's ThinkPad series, primarily aimed at the educational sector and consumers seeking a reliable, budget-friendly option. Released as a part of IBM's initiative to enhance educational technology, the A21e brings together essential features, practical technologies, and robust characteristics that cater to students and everyday users alike.

One of the most distinguishing features of the A21e is its display. The laptop typically comes with a 14.1-inch screen, offering a resolution of 1024 x 768 pixels. This size provides a balance between portability and usability, making it ideal for students who need to carry their devices between classes without sacrificing screen real estate.

The keyboard is another highlight of the A21e. Renowned for its tactile feedback and comfortable typing experience, the spill-resistant keyboard enables users to write long essays or perform programming tasks with ease. Additionally, the laptop's design includes function keys that make it convenient to perform common computing tasks swiftly.

Under the hood, the A21e is powered by Intel processing technology, typically featuring Intel Celeron or Pentium processors. This ensures that the device is equipped to handle daily tasks such as word processing, web browsing, and multimedia playback. The laptop usually features a discrete graphics option for users who may require a bit more graphical power, catering to casual gamers or multimedia creators.

The memory options for the A21e generally range up to 1GB of RAM, which supports smooth multitasking for basic applications. With a hard drive capacity extending to 40GB or more, users have ample storage for documents, media files, and educational resources. It also features a DVD-ROM drive, allowing for the playback of multimedia and installation of software from physical media.

Connectivity-wise, the IBM A21e supports a variety of ports, including USB 1.1 for peripheral connections, a multimedia card slot, and an Ethernet port for networking capabilities. This emphasis on connectivity ensures that users can integrate the laptop into diverse environments, whether for classroom use or home study.

The laptop's build quality contributes to its perceived durability. With rugged features designed to withstand the rigors of school life, the A21e stands as a practical choice for students and educational institutions alike. Overall, the IBM A21e combines essential features with flexible technologies, making it an enduring tool for learning and productivity.