Solving computer problems

 

 

Message

Solution

 

 

0251: System CMOS

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

checksum bad

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

 

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

 

computer serviced.

 

 

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.

incomplete

Turn 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

 

 

 

1802: Unauthorized

The Mini-PCI network card is not supported on this computer. Remove it.

network card is plugged

 

in - Power off and

 

remove the miniPCI

 

network card.

 

 

 

The power-on password

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

prompt

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

 

accepted, a supervisor password might 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. Type the password and press Enter to use the

prompt

computer.

 

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

 

 

Chapter 2. Solving computer problems 15

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IBM R40 manual Solving computer problems

R40 specifications

The IBM R40, part of the ThinkPad series, is a robust laptop that was introduced in the early 2000s, catering primarily to business professionals and demanding users. The R40 is notable for its combination of performance, reliability, and mobility, making it an attractive choice for those seeking a dependable mobile computing solution.

One of the standout features of the R40 is its sturdy design, which embodies the ThinkPad philosophy of durability and ergonomics. The laptop has a classic black chassis made from high-quality plastic and reinforced with magnesium alloy, providing resistance against everyday wear and tear. The spill-resistant keyboard is another practical aspect, designed to prevent damage from liquid spills.

The R40 is powered by Microsoft Windows XP, one of the most widely used operating systems during its time. It is equipped with a range of processors, including the Intel Pentium 4 M or the Pentium M, which contribute to its commendable performance in multitasking and running business applications. The laptop typically comes with 256 MB to 2 GB of RAM, with the flexibility to expand depending on user requirements, and a hard drive capacity of 30 GB to 100 GB for ample storage of files and software.

In terms of display, the R40 features a 14.1-inch or 15-inch XGA screen, providing clear visual performance for both professional and personal use. The TFT display offers vibrant colors and decent viewing angles, making it suitable for presentations and video playback. Additionally, the R40 includes an integrated graphics card, which provides adequate performance for general use, though it may struggle with intensive graphic applications.

The R40 is equipped with essential connectivity options, including USB ports, a PC Card slot, and a built-in Ethernet port for wired connections. Optional wireless connectivity through Wi-Fi is also available, allowing users to stay connected to the internet on the go. The presence of a DVD-ROM drive or optional CD-RW/DVD combo drive enhances its functionality, enabling users to access software and media easily.

Battery life is a crucial factor for portable devices, and the R40 offers moderate longevity, enabling around 3 to 4 hours of usage on a fully charged battery, depending on usage patterns. This ability to sustain work sessions without constant access to a power outlet increases its appeal for business travelers.

Overall, the IBM R40 is characterized by its reliable build quality, moderate performance, and comprehensive features, making it a suitable choice for users who prioritize functionality and durability in their laptop. Its design has stood the test of time, and it remains a respected option among those with an appreciation for the classic ThinkPad lineage.