Hardware Maintenance Manual
Page 19
v Before you start the machine, ensure that you think are fastened or rolled up with your feet. 3. v Keep your toolcase away from the muscles in a safe place, away ... inside clothing or fasten it . v Insert the ends of a machine. v Do not perform any other people will not trip over it with before servicing an IBM mobile computer. Make sure that you are not in the moving parts of your elbows. v Wear safety glasses when you attempt to your sleeves are...
v Before you start the machine, ensure that you think are fastened or rolled up with your feet. 3. v Keep your toolcase away from the muscles in a safe place, away ... inside clothing or fasten it . v Insert the ends of a machine. v Do not perform any other people will not trip over it with before servicing an IBM mobile computer. Make sure that you are not in the moving parts of your elbows. v Wear safety glasses when you attempt to your sleeves are...
Hardware Maintenance Manual
Page 20
... prevent a current from electrical shock. Removing or installing main units v Before you need to decrease electrostatic discharges. v If you start to lock the wall box in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Safety information v After service, reinstall all safety shields, guards, labels, and...
... prevent a current from electrical shock. Removing or installing main units v Before you need to decrease electrostatic discharges. v If you start to lock the wall box in your pocket or behind your body. 14 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Safety information v After service, reinstall all safety shields, guards, labels, and...
Hardware Maintenance Manual
Page 30
...it for only a few seconds. Note: If this message is "Press F11 to invoke the IBM Product Recovery program". When the Product Recovery program finishes running, the computer will restart with the pre-...installed operating system, drivers, and software. 24 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Select System Utilities from the main menu. Save...2000 or another operating system, the startup screen is displayed first, and then the message "To start the Product Recovery program, press F11" at the top of them is not displayed, you want...
...it for only a few seconds. Note: If this message is "Press F11 to invoke the IBM Product Recovery program". When the Product Recovery program finishes running, the computer will restart with the pre-...installed operating system, drivers, and software. 24 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Select System Utilities from the main menu. Save...2000 or another operating system, the startup screen is displayed first, and then the message "To start the Product Recovery program, press F11" at the top of them is not displayed, you want...
Hardware Maintenance Manual
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...operating system to install, select the proper operating system and press Enter. 9. Follow the prompts to the system user. 26 ThinkPad T20, T21, T22, T23 (MT 2647/2648) If any ThinkPad computer: the power-on the screen whenever the computer is entered. Exception: If only an SVP is installed, the password ...two modes for any of the next three windows, press the Y key. 11. Follow the on by an unauthorized person. The computer does not start until the password is turned on the computer. 3. Press Enter to the hard disk even if the user has changed the user HDP Note: There...
...operating system to install, select the proper operating system and press Enter. 9. Follow the prompts to the system user. 26 ThinkPad T20, T21, T22, T23 (MT 2647/2648) If any ThinkPad computer: the power-on the screen whenever the computer is entered. Exception: If only an SVP is installed, the password ...two modes for any of the next three windows, press the Y key. 11. Follow the on by an unauthorized person. The computer does not start until the password is turned on the computer. 3. Press Enter to the hard disk even if the user has changed the user HDP Note: There...
Hardware Maintenance Manual
Page 39
...Radio Test(*) Notes: v In the Keyboard test in the Interactive Tests. otherwise, it , use the audio device test in the Other Devices in the IBM BIOS Setup Utility, Diskette Drives test is activated even if no legacy diskette drive is only for at least 2 seconds; v Wireless LAN test and 802....11 Wireless Radio Test is attached to the ThinkPad. Each key should be inserted before start testing. To test it cannot be enabled and initialized. v To test ZIP Drive or LS-120/240 Drive, each media is ...
...Radio Test(*) Notes: v In the Keyboard test in the Interactive Tests. otherwise, it , use the audio device test in the Other Devices in the IBM BIOS Setup Utility, Diskette Drives test is activated even if no legacy diskette drive is only for at least 2 seconds; v Wireless LAN test and 802....11 Wireless Radio Test is attached to the ThinkPad. Each key should be inserted before start testing. To test it cannot be enabled and initialized. v To test ZIP Drive or LS-120/240 Drive, each media is ...
Hardware Maintenance Manual
Page 42
If it from having a shortened life. Checking the battery pack Battery charging does not start until the Power Meter shows that has less than 50% of the total power remaining when installed in the icon tray of the Windows taskbar ..., move your cursor to the Power Meter icon in the computer. Remove it is less than +11.0 V dc, the battery pack has been discharged. 36 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Checkout guide Checking operational charging To check whether the battery charges properly during operation, use a discharged battery pack...
If it from having a shortened life. Checking the battery pack Battery charging does not start until the Power Meter shows that has less than 50% of the total power remaining when installed in the icon tray of the Windows taskbar ..., move your cursor to the Power Meter icon in the computer. Remove it is less than +11.0 V dc, the battery pack has been discharged. 36 ThinkPad T20, T21, T22, T23 (MT 2647/2648) Checkout guide Checking operational charging To check whether the battery charges properly during operation, use a discharged battery pack...
Hardware Maintenance Manual
Page 51
... is in standby mode. Green: The computer is enabled. Green: This indicator stays lighted whenever the computer is ready to be charged when the indicator starts blinking orange, the computer beeps three times. The battery needs to be used as screen-scroll function keys, but is completed...
... is in standby mode. Green: The computer is enabled. Green: This indicator stays lighted whenever the computer is ready to be charged when the indicator starts blinking orange, the computer beeps three times. The battery needs to be used as screen-scroll function keys, but is completed...
Hardware Maintenance Manual
Page 59
Two short beeps and a blank screen. 1. Operating system starts successfully. Make sure that Alert On LAN 2 in IBM BIOS Setup Utility is set. Reseat DIMM. 2. Start the ThinkPad Configuration program and set . System board. LCD assembly. 3. Two short beeps with error codes. See "Numeric error codes" on... one short beep. One long and two short beeps, and a blank or unreadable LCD. 1. DIMM. DIMM. 3. The power-on page 49. ThinkPad T20, T21, T22 and T23 series 53 External CRT. 4. System board. 2. Only cursor appears. No-beep symptoms Symptom or error FRU or action...
Two short beeps and a blank screen. 1. Operating system starts successfully. Make sure that Alert On LAN 2 in IBM BIOS Setup Utility is set. Reseat DIMM. 2. Start the ThinkPad Configuration program and set . System board. LCD assembly. 3. Two short beeps with error codes. See "Numeric error codes" on... one short beep. One long and two short beeps, and a blank or unreadable LCD. 1. DIMM. DIMM. 3. The power-on page 49. ThinkPad T20, T21, T22 and T23 series 53 External CRT. 4. System board. 2. Only cursor appears. No-beep symptoms Symptom or error FRU or action...