User manual IBM THINKPAD T20

[. . . ] Note Before using this information and the product it supports, be sure to read the general information under "Important safety instructions" on page v and "Notices" on page 47. First Edition (March 2000) The following paragraph does not apply in the United Kingdom or any other 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 of 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. [. . . ] Connect the ac adapter to the computer, and press Fn. The computer does not return from standby mode, or the standby indicator stays on and the computer does not work. Chapter 3. Solving computer problems 25 Hardware troubleshooting Problem When you are using the port replicator, resuming normal operation from hibernation or standby mode takes a long time. Cause and action If the Ethernet port is enabled, but the port replicator is not connected to a network, resuming operation can take a long time. The computer queries the Ethernet until the timeout timer stops the query. If you are not using the network, disable the Ethernet connector as follows: For Windows 98: 1. Restart the computer by turning it off and on again. Check whether any option has been selected to disable your computer from entering standby or hibernation mode. 26 IBM ThinkPad T20 User's Reference Hardware troubleshooting Problem The computer does not enter standby mode after the interval set on the timer under Windows 98 or Windows NT. Cause and action For Windows 98: The generic CD-ROM or DVD-ROM driver for Windows 98 accesses the internal CD-ROM drive or DVD-ROM drive every 3 seconds to see whether a CD-ROM is inserted in the CD-ROM drive or the DVD-ROM drive. This prevents your computer from entering standby mode even after a timeout. Clear the Auto insert notification check box. Windows 98 no longer detects a CD-ROM or a DVD-ROM automatically. For Windows NT: If you enable the CD-ROM AutoRun feature, the timer does not send the computer into standby mode. To enable the timer in this situation, edit the configuration information in the registry as follows: HKEY_LOCAL_MACHINE\SYSTEM\ CurrentControlSet\Services¥Cdrom\ Autorun: x1 > Autorun: Chapter 3. Solving computer problems 27 Hardware troubleshooting Problem The Fn+F12 key combination does not make the computer enter hibernation mode. Cause and action Enable hibernation mode as follows: For Windows 98: 1. Click the Create Now button. The computer cannot enter hibernation mode if you are using one of the IBM communication PC Cards. To enter hibernation mode, stop the communication program, and then remove the PC Card or disable the PC Card slot, using the Control Panel. For Windows NT: Note: In Windows NT, you can use hibernation mode only if your hard disk has been formatted in the FAT format. If you format your hard disk with NTFS, the default format in Windows NT, you cannot use hibernation mode. The computer cannot enter hibernation mode when you are using one of the IBM communication PC Cards. To enter hibernation mode, stop the communication program, and then remove the PC Card or disable the PC Card slot, using the Control Panel. LCD problems Problem The screen is blank. If the problem persists, do the "Cause and action" for the next problem in this list. 28 IBM ThinkPad T20 User's Reference Hardware troubleshooting Problem The screen is unreadable or distorted. Cause and action Make sure of the following: The device driver for the display is installed correctly. To check these settings, do as follows: Open the Display Properties window as follows: 1. Make sure the output is displayed correctly. Incorrect characters appear on the screen. Missing, discolored, or bright dots appear on the screen every time you turn on your computer. Make sure that the operating system and the application program are installed and configured correctly. Press and hold the power switch for 4 seconds or more to turn off your computer; then turn it on again. Your computer's display contains multiple thin-film transistors (TFTs). [. . . ] Product warranty and notices 53 Notices Product notice requirements The following notice applies to machines equipped with both a DVD function and a TV-out function: This product incorporates copyright protection technology that is protected by method claims of U. S. patent numbers 4631603, 4577216, 4819098, 4907093, and other intellectual property rights owned by Macrovision Corporation and other rights owners. Use of this copyright protection technology must be authorized by Macrovision Corporation and is intended for home and other limited viewing use only, unless otherwise authorized by Macrovision Corporation. Reverse engineering or disassembly is prohibited. Notice for Australia The following notice applies when using the telephony functions: WARNING: FOR SAFETY REASONS, ONLY CONNECT EQUIPMENT WITH A TELECOMMUNICATIONS COMPLIANCE LABEL. [. . . ]