Lenovo ThinkPad X20 English - 12P0280 - ThinkPad X20, X21User's Reference - Page 37

No error codes or messages - ram

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Troubleshooting Operating system not found. Fan error EMM386 Not Installed--Unable to Set Page Frame Base Address. CardBus Configuration Error--Device Disabled. Verify the following: The hard disk drive is correctly installed. A startable diskette is in the diskette drive If you still see the same error message, check the boot sequence using the BIOS Setup Utility. Cooling fan is failing. Have the computer serviced. Edit C:\CONFIG.SYS and change a line from device=C:\WINDOWS\EMM386.EXE RAM to device=C:\WINDOWS\EMM386.EXE NOEMS and save this file Press F1 to go to IBM BIOS Setup Utility. Press F9 and then Enter to load the default setting. Press F10 and then Enter to restart the system. No error codes or messages Problem The screen is blank and you don't hear any beeps. Note: If you are not sure whether you hear any beeps, turn the computer off; then turn it on and listen again. If you are using an external monitor, see the external monitor problems in the Online user's guide. Action If a Power-on password is set, press any key to display the power-on password prompt, and then type the correct password and press Enter. If the power-on password prompt does not appear, the brightness control lever might be set to minimum brightness. Adjust the brightness level by pressing the Fn + Home key. If the screen still remains blank, make sure that: The battery pack is installed correctly. The AC Adapter is connected to the computer and the power cord is plugged into a working electrical outlet. The computer power is on. (Press the power switch again for confirmation.) If these items are properly set, and the screen remains blank, have the computer serviced. Chapter 5. Solving Computer Problems 33

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Troubleshooting
Operating system not found.
Verify the following:
±
The hard disk drive is correctly installed.
±
A startable diskette is in the diskette drive
If you still see the same error message, check the boot sequence using
the BIOS Setup Utility.
Fan error
Cooling fan is failing. Have the computer serviced.
EMM386 Not Installed--Unable to Set
Page Frame Base Address.
Edit C:\CONFIG.SYS and change a line from
device=C:\WINDOWS\EMM386.EXE
RAM to
device=C:\WINDOWS\EMM386.EXE
NOEMS
and save this file
CardBus Configuration Error--Device
Disabled.
Press F1 to go to IBM BIOS Setup Utility. Press F9 and then Enter to
load the default setting.
Press F10 and then Enter to restart the system.
No error codes or messages
Problem
Action
The screen is blank and you don't hear
any beeps.
Note:
If you are not sure whether you
hear any beeps, turn the com-
puter off; then turn it on and
listen again.
If you are using an external monitor,
see the external monitor problems in
the
Online user's guide
.
If a Power-on password is set, press any key to display the power-on
password prompt, and then type the correct password and press
Enter
.
If the power-on password prompt does not appear, the brightness
control lever might be set to minimum brightness. Adjust the brightness
level by pressing the Fn + Home key. If the screen still remains blank,
make sure that:
±
The battery pack is installed correctly.
±
The AC Adapter is connected to the computer and the power cord
is plugged into a working electrical outlet.
±
The computer power is on. (Press the power switch again for con-
firmation.)
If these items are properly set, and the screen remains blank, have the
computer serviced.
Chapter 5.
Solving Computer Problems
33