Troubleshooting, Error messages

Solving computer problems

Troubleshooting

If you do not find your problem here, refer to access ThinkPad, your on-board help system. Open Access ThinkPad by pressing the ThinkPad button. The following section only describes problems that might prevent you from accessing this help system.

Error messages

Note:

1.In the charts, x can be any character.

2.The version of PC-Doctor referred to here is PC-Doctor for Windows.

Message	Cause and action

0175: Bad CRC1, stop	The EEPROM checksum is not correct (block #6). Have the computer
POST task	serviced.

0187: EAIA data access	The access to EEPROM has failed. Have the computer serviced.
error

0188: Invalid RFID	The EEPROM checksum is not correct (block # 0 and 1, or block # 6). The
serialization information	system board should be replaced, and the box serial number needs to be
area or bad CRC2	reinstalled. Have the computer serviced.

0189: Invalid RFID	The EEPROM checksum is not correct (block # 4 and 5). The system board
configuration	should be replaced, and the UUID needs to be reinstalled. Have the
information area	computer serviced.

0190: Critical low-battery	The computer turned off, because the battery is low. Connect the ac adapter
error	to the computer and charge the battery pack, or replace the battery pack
	with a fully charged one.

0200: Hard disk error	The hard disk is not working. Make sure the hard disk drive is attached
	firmly. Run the BIOS Setup Utility; then make sure the hard disk drive is
	not disabled in the Startup menu.

021x: Keyboard error	Make sure that no object is placed on the keyboard or on the external
	keyboard, if you have one. Turn off the computer, and turn off all attached
	devices. Turn on the computer first; then turn on the attached devices. If
	you still see the same error code, do the following:
	If an external keyboard is connected, do the following:
	v Turn off the computer and disconnect the external keyboard; then turn on
	the computer. Make sure that the built-in keyboard operates correctly. If it
	does, have the external keyboard serviced.
	v Make sure that the external keyboard is connected to the correct
	connector.
	Test the computer, using PC-Doctor.
	v If the computer stops during the test, have the computer serviced.

Chapter 2. Solving computer problems 11

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.