Lenovo ThinkPad 770 ThinkPad 770 User's Guide - Page 118

No Error Codes or Screen Messages, Message, Action, KB OK, Problem, Enter

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Title: C79DMMST CreationDate: 07/16/97 13:09:22 Message xxxxx KB OK appears and the computer stops. Action Have the computer serviced. No Error Codes or Screen Messages Problem The screen is blank and you don't hear any beeps. Note: If you are not sure whether you heard any beeps or not, turn the computer off; then turn it on again, and listen again. The screen is blank and you can't hear any beeps. Note: If you are using an external display, go to "An External Display Problem" on page 4-27. The screen is blank and you hear a continuous beep, or two or more beeps. Only the cursor appears. Action 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. (Turn on the power switch again for confirmation.) If these items are correct and the screen remains blank, have the computer serviced. 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 (see page 2-16). If the power-on password does not appear, the brightness control lever might be set to minimum brightness. Adjust the brightness level. If the screen still remains blank, have the computer serviced. Have the computer serviced. Reinstall your operating system and turn on the computer. If you still have a problem, have the computer serviced. 4-10

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Message
Action
xxxxx
KB OK
appears
and the computer stops.
Have the computer serviced.
No Error Codes or Screen Messages
Problem
Action
The screen is blank and
you don't hear any beeps.
Note:
If you are not sure
whether you heard any
beeps or not, turn the
computer off; then turn it
on again, and listen again.
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.
(Turn on the power switch again for
confirmation.)
If these items are correct and the screen remains blank, have the computer
serviced.
The screen is blank and
you can't hear any beeps.
Note:
If you are using an
external display, go to “An
External Display Problem”
on page
4-27.
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
(see page 2-16).
If the power-on password does not appear, the brightness control lever might be
set to minimum brightness.
Adjust the brightness level.
If the screen still
remains blank, have the computer serviced.
The screen is blank and
you hear a continuous
beep, or two or more
beeps.
Have the computer serviced.
Only the cursor appears.
Reinstall your operating system and turn on the computer.
If you still have a problem, have the computer serviced.
4-10
Title: C79DMMST CreationDate: 07/16/97 13:09:22