Lenovo SL400 Service Guide - Page 24

Errors without messages - power cord

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Beep errors Three short beeps, pause, three more short beeps, and one short beep. Confirm that the memory cards have been installed correctly. If the problem persists, contact the administrator. One short beep, pause, three short beeps, pause, three more short beeps, and one short beep. Only the cursor appears. Reinstall the operating system. Five short beeps and Contact the administrator. a blank screen Errors without messages Problem: When I turn on the machine, nothing appears on the screen and the machine does not beep while starting up. Note: If you are not sure whether you heard any beeps: 1. Turn off the computer by pressing and holding the power switch for 4 seconds or more. 2. Turn it on and listen again. Solution: 1. Make sure that: v The battery is installed correctly. v The AC adapter is connected to the computer and the power cord is plugged into a working electrical outlet. v The computer is turned on. (Turn the power switch on again for confirmation.) 2. If a power-on password is set: a. Press any key to display the prompt for the power-on password. If the brightness level of the screen is low, increase it by pressing the Fn+End. b. Type the correct password and press Enter. 3. If these items are set properly, and the screen remains blank, have the computer serviced. 16 ThinkPad® SL300, SL400, and SL500 Service and Troubleshooting Guide

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Beep errors
Three short beeps,
pause, three more
short beeps, and one
short beep.
Confirm that the memory cards have been installed correctly. If
the problem persists, contact the administrator.
One short beep,
pause, three short
beeps, pause, three
more short beeps,
and one short beep.
Only the cursor
appears.
Reinstall the operating system.
Five short beeps and
a blank screen
Contact the administrator.
Errors without messages
Problem:
When I turn on the machine, nothing appears on the screen and the machine
does not beep while starting up.
Note:
If you are not sure whether you heard any beeps:
1.
Turn off the computer by pressing and holding the power switch for 4
seconds or more.
2.
Turn it on and listen again.
Solution:
1.
Make sure that:
v
The battery is installed correctly.
v
The AC adapter is connected to the computer and the power cord is
plugged into a working electrical outlet.
v
The computer is turned on. (Turn the power switch on again for
confirmation.)
2.
If a power-on password is set:
a.
Press any key to display the prompt for the power-on password. If
the brightness level of the screen is low, increase it by pressing the
Fn+End.
b.
Type the correct password and press Enter.
3.
If these items are set properly, and the screen remains blank, have the
computer serviced.
16
ThinkPad
®
SL300, SL400, and SL500 Service and Troubleshooting Guide