Solving computer problems

Message

Cause and action

 

 

0220: Monitor type error

The monitor type does not match the type specified in CMOS. Run the IBM

 

BIOS Setup Utility to make sure that your monitor type matches the type

 

specified in the utility.

 

 

0230: Shadow RAM error

The shadow RAM failed. Test your computer’s memory with PC-Doctor. If

 

you added a memory module just before turning the computer on, reinstall

 

it. Then test the memory with PC-Doctor.

 

 

0231: System RAM error

The system RAM failed. Test your computer’s memory with PC-Doctor. If

 

you added a memory module just before turning the computer on, reinstall

 

it. Then test the memory with PC-Doctor.

 

 

0232: Extended RAM

The extended RAM failed. Test your computer’s memory with PC-Doctor. If

error

you increased memory just before turning the computer on, reinstall it. Then

 

test the memory with PC-Doctor.

 

 

0250: System battery

The system battery is dead. Replace the battery and run the IBM BIOS Setup

error

Utility to verify the configuration. If you still have a problem, have the

 

computer serviced.

 

 

0251: System CMOS

The system CMOS may have been corrupted by an application program.

checksum bad

The computer uses the default settings. Run the BIOS Setup Utility to

 

reconfigure the settings. If you still see the same error code, have the

 

computer serviced.

 

 

0252: Password

The password you have set has been cleared. Run the BIOS Setup Utility to

checksum bad

set the password.

 

 

0260: System timer error

Have the computer serviced.

 

 

0270: Real time clock

Have the computer serviced.

error

 

 

 

0271: Date and time error

Neither the date nor the time is set in the computer. Set the date and time,

 

using the IBM BIOS Setup Utility.

 

 

0280: Previous boot

Your computer was previously unable to complete the boot process. Turn

incomplete

the computer off; then turn it on to start the IBM BIOS Setup Utility. Verify

 

the configuration and then restart the computer either by choosing the Exit

 

Saving Changes option under the Restart item or by pressing F10. If you

 

still see the same error code, have the computer serviced.

 

 

02D0: System cache error

The cache is disabled. Have the computer serviced.

 

 

02F4: EISA CMOS not

Have the computer serviced.

writable

 

 

 

02F5: DMA test failed

Have the computer serviced.

 

 

02F6: Software NMI

Have the computer serviced.

failed

 

 

 

02F7: Fail-safe timer NMI

Have the computer serviced.

failed

 

 

 

12ThinkPad® A21e Service and Troubleshooting Guide

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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.