IBM ThinkPad 755CX, Manual

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What If Your Computer Does Not Work?
Screen Message Action
184 The entered password is invalid. Turn off the computer and wait at least 5
seconds; then turn it on again and type the correct password.
190 The computer has turned off because of a critically low-battery condition.
Action:
Connect the AC Adapter to the computer and charge the battery pack.
195 The system configuration before and after hibernation mode differs, and the
computer cannot resume normal operation.
Action:
Change the system configuration to what it was before the computer entered
hibernation mode.
If the memory size is changed, re-create the hibernation file (see page 59).
196 The computer cannot read the hibernation file.
Have the computer serviced.
2
xx
Verify that the IC DRAM card or DIMM option is correctly installed.
30
x
Turn off the computer and all attached devices. Turn on the computer first; then
turn on the attached devices.
If the computer has an external keyboard connected, verify that:
1. The external keyboard is connected to the correct side of the
keyboard/mouse connector (see page 163).
2. The keyboard/mouse connector is correctly connected to the computer.
If the preceding items are correct, disconnect the keyboard/mouse connector
from the computer and verify that the operation of the system keyboard is
correct. If the system keyboard works correctly, have the keyboard/mouse
connector or the external keyboard serviced.
Test the computer by selecting the Start icon.
– If the computer stops during testing and does not continue, have the
computer serviced.
– If the tests do not find a problem but one still exists, find the problem in
“What If Testing Cannot Find the Problem?” on page 211.
Chapter 8. Solving Computer Problems
209