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. [. . . ] See the instructions which come with the microphone. 86 ThinkPad 240 User's Reference Troubleshooting guide Troubleshooting guide If a beep sounds, a message appears, or a function-related problem occurs: 1. Find your symptom in the Troubleshooting Charts and try solving the problem. If you can't solve the problem, note the error code and have the computer serviced Chapter 5, "Getting Service" on page 121 If you accidentally lose or damage software in your computer: Recover it by using the Recovery CD. software" on page 109 "Recovering lost or damaged Chapter 4. Solving computer problems 87 Troubleshooting charts Troubleshooting charts If your computer has an error, it often displays a message or an error code, or a beep sounds when you power it on. If you find the problem, go to the page indicated and do the specified action. Troubleshooting Chart Error codes or screen messages No error codes or screen messages Input problems Suspend or hibernation problems LCD problems Indicator problems Battery problems Hard disk drive problems Infrared communication problems Audio or telephony problems Universal serial bus (USB) problems Modem problems PC Card problems Printer problems External display problems Other option problems Software problems Other problems Page 89 92 93 95 96 97 97 98 98 99 99 100 102 103 104 106 107 108 88 ThinkPad 240 User's Reference Troubleshooting charts Error codes or messages Note: In the charts, x can be any character. Run the BIOS setup utility; then make sure the hard disk drive is properly identified. Make sure no object is placed on the keyboard or on the external keyboard, if you have one. If you still have a problem, do the following: If an external keyboard is connected: ­ Power off the computer and disconnect the external keyboard; then power on the computer. ­ Make sure that the external keyboard is connected to the correct connector if connected to computer using the keyboard/mouse cable. ­ If the computer stops during the test, have the computer serviced. 0220 (monitor type error) 0230 (shadow RAM error) The monitor type does not match the CMOS. If you have increased memory just before powering the computer on, reinstall the DIMM. If you have increased memory just before powering the computer on, reinstall the DIMM. If you have increased memory just before powering the computer on, reinstall the DIMM. 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. 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. 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. Type the correct password and press Enter to use the computer (see "Entering a password" on page 73). [. . . ] When power is turned on again, the computer immediately restores the same data and applications as when hibernation mode started, without restarting the operating system. A graphic symbol, displayed on a screen, that a user can point to with a pointing device such as a TrackPoint or mouse to select a particular function or software application. Often referred to as randomaccess memory (RAM), measured in kilo- bytes (KB) or megabytes (MB) of information. One or more microinstructions used in a product as an alternative to hard-wired circuitry to implement functions of a processor or other system component. [. . . ]