A Password Problem - Lenovo ThinkPad G40 Series Service And Troubleshooting Manual

Solving computer problems
Solution:
Make sure that the memory card is installed correctly. If it is, but the
screen is still blank, and you hear five beeps, have the computer serviced.
If you hear 4 cycles of 4 beeps each, the Security Chip has a problem.
Have the computer serviced.
Problem:
When I turn on the machine, only a white pointer appears on a blank
screen.
Solution:
Reinstall your operating system, and turn on the computer. If you still see
only the pointer on the screen, have the computer serviced.
Problem:
My screen goes blank while the computer is on.
Solution
Your screen saver or power management may be enabled. Touch the
TrackPoint or press a key to exit the screen saver, or press the power
switch to resume from standby or hibernation mode.
Problem:
The DOS full-screen looks smaller.
Solution:
If you use a DOS application that supports only 640×480 resolution (VGA
mode), the screen image might look slightly distorted or appear smaller
than the display size. This is to maintain compatibility with other DOS
applications. To expand the screen image to the same size as the actual
screen, start the ThinkPad Configuration Program and click LCD; then
select the Screen expansion function. (The image might still look slightly
distorted.)

A password problem

Problem:
I forgot my password.
Solution:
If you forgot your power-on password, you must take your computer to a
Lenovo authorized servicer or a marketing representative to have the
password canceled.
If you forgot your hard disk password, a Lenovo authorized servicer can
not reset your password or recover data from the hard disk. You must take
your computer to a Lenovo authorized servicer or a marketing
representative to have the hard disk drive replaced. Proof of purchase is
required, and a fee will be charged for parts and service.
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ThinkPad G40 Series Service and Troubleshooting Guide