User manual IBM THINKPAD X20

[. . . ] i note Before using this information and the product it supports, be sure to read the general information under Chapter 1, "Safety information" on page 1, and "Notices" on page 60. First Edition (June 2000) 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. [. . . ] If the optional Quick Charger is available, use it to charge the overdischarged battery pack. Your computer shuts down before the battery status indicator shows empty, Discharge and recharge the battery pack. -or-Your computer operates after the battery status indicator shows empty. The operating time for a fully charged battery pack is short. The computer does not operate with a fully charged battery pack. Discharge and recharge the battery pack. If your battery's operating time is still short, use a new battery pack. The surge protector in the battery pack might be active. Turn off the computer for one minute to reset the protector; then turn on the computer again. You cannot charge the battery when it is too hot. If the battery feels hot, remove it from the computer and allow it to cool to room temperature. After it cools, reinstall it and recharge the battery. If it still cannot be charged, have it serviced. 40 ThinkPad X20 User's Reference Troubleshooting Hard disk drive problems Problem The hard disk drive makes a rattling noise intermittently. Cause and action The rattling noise might be heard when: The hard disk drive starts accessing the data or when it stops. This is a normal characteristic of a hard disk drive and is not a defect. In the startup menu in IBM BIOS Setup Utility, make sure that there is no exclamation point to the left of the hard-disk drive. If there is such a mark, the hard-disk drive is disabled. Clear the mark to enable the drive. Software problems Problem An application does not run correctly. Cause and action Make sure that the problem is not being caused by the application: Check that your computer has the minimum required memory to run the application. Refer to the manuals supplied with the application. Check that the application is designed to operate with your operating system. Check that other applications run correctly on your computer. Check that the necessary device drivers are installed. Check that the application works when it is run on some other computer. [. . . ] 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. [. . . ]