User manual IBM THINKPAD 240

[. . . ] i Note: Before using this information and the product it supports, be sure to read the general information under "Safety information" on page vii, "Ergonomics information" on page 40, and "Notices" on page 143. First Edition (June 1999) The following paragraph does not apply to the United Kingdom or any country where such provisions are inconsistent with local law: INTERNATIONAL BUSINESS MACHINES CORPORATION PROVIDES THIS PUBLICATION "AS IS" WITHOUT ANY WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE LIMITED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimers or express or implied warranties in certain transactions; therefore, this statement may not apply to you. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in new editions of the publication. [. . . ] Then test the memory with the PC Doctor. Test your computer's memory with the PC Doctor. If you have increased memory just before powering the computer on, reinstall the DIMM. Then test the memory with the PC Doctor. Replace the battery and run the BIOS setup utility to verify the configuration. If you still have a problem, have the computer serviced. 021x (keyboard error) 0231 (system RAM error) 0232 (extended RAM error) 0250 (system battery error) Chapter 4. Solving computer problems 89 Troubleshooting charts Problem 0251 (system CMOS checksum bad) Action The system CMOS might have been corrupted by an application program. Run the BIOS setup utility to reconfigure the settings. If you still have a problem, have the computer serviced. 0252 (password checksum bad) 0260 (system line error) 0270 (real time clock error) 0271 (date and time error) 0280 (Previous boot incomplete -- Default configuration used) The password you have set is cleared. Run the BIOS setup utility to set the password. Neither the date nor the time is set in the computer. Set the date and time using the BIOS setup utility. Your computer was previously unable to complete the boot process. Power the computer off; then power it on to start the BIOS setup utility. If the same error message appears, have the computer serviced. 02D0 (system cache error) 02F4 (EISA CMOS not writable) 02F5 (DMA test failed) 02F6 (software NMI failed) 02F7 (fail-safe timer NMI failed) The power-on password prompt The hard disk drive password prompt The cache is disabled. A power-on password or supervisor password is set. Type the correct password and press Enter to use the computer (see "Entering a password" on page 73). If you still have a problem, have the computer serviced. Type the correct password and press Enter to use the computer (see "Entering a password" on page 73). If you still have a problem, have the computer serviced. 90 ThinkPad 240 User's Reference Troubleshooting charts Problem The DOS full-screen looks smaller. Action If you use a DOS application that supports only the 640x480 resolution (VGA mode), the screen image might look slightly distorted or might 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. [. . . ] A port used to attach such devices as dot-matrix printers and input/output units; it transmits data 1 byte at a time. A kind of suspend mode where only a part of the system components use power. A redundancy check by which a recalculated parity bit is compared with the pregiven parity bit. A series of letters or numbers that you designated to restrict access to your computer. [. . . ]