Lenovo ThinkPad 380ED ThinkPad 380 and 380D User's Guide - Page 175

External Monitor Problems, Problem, Action, Display

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Troubleshooting External Monitor Problems Problem The screen is blank. The screen is unreadable or distorted. Wrong characters appear on the screen. Action Verify that: The power cord for the external monitor is plugged into a working electrical outlet and into the external monitor. The external monitor is turned on and the brightness and contrast controls are adjusted. The signal cable for the external monitor is plugged into the external-monitor connector on the computer. Some signal cables might not fit into the external-monitor connector because of the connector type. The external monitor (CRT or Both ) is selected as the display device using the Fn key function (see page 22) or the ThinkPad Features program (see page 28). After verifying the preceding items, turn off the computer; then turn it on. If the external monitor remains blank, run the display tests described in the instructions supplied with the external monitor. If the tests show the external display is OK, have the computer serviced. Verify that: The ThinkPad display driver is installed correctly (see Chapter 7). The device setup parameters in the display setting screen (click on the Display ( ) icon in the ThinkPad Features program) are set to your display resolution and color type (see page 42). To change or set up the external monitor, see "Attaching an External Monitor" on page 42. If these are correct, run the tests described in the instructions supplied with the external monitor. If the tests show the external display is OK, have the computer serviced. Verify that the operating systems and application programs have been installed and configured correctly. If so, have the computer serviced. Chapter 8. Solving Computer Problems 155

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Troubleshooting
External Monitor Problems
Problem
Action
The screen is blank.
Verify that:
The power cord for the external monitor is plugged into a working electrical
outlet and into the external monitor.
The external monitor is turned on and the brightness and contrast controls
are adjusted.
The signal cable for the external monitor is plugged into the external-monitor
connector on the computer.
Some signal cables might not fit into the
external-monitor connector because of the connector type.
The external monitor (
CRT
or
Both
) is selected as the display
device using the
Fn
key function (see page
22) or the ThinkPad Features
program (see page
28).
After verifying the preceding items, turn off the computer; then turn it on.
If the external monitor remains blank, run the display tests described in the
instructions supplied with the external monitor.
If the tests show the external
display is OK, have the computer serviced.
The screen is unreadable
or distorted.
Verify that:
The ThinkPad display driver is installed correctly (see Chapter
7).
The device setup parameters in the display setting screen (click on the
Display
(
) icon in the ThinkPad Features program) are set to your
display resolution and color type (see page
42).
To change or set up the external monitor, see “Attaching an External Monitor”
on page
42.
If these are correct, run the tests described in the instructions supplied with the
external monitor.
If the tests show the external display is OK, have the
computer serviced.
Wrong characters appear
on the screen.
Verify that the operating systems and application programs have been installed
and configured correctly.
If so, have the computer serviced.
Chapter 8.
Solving Computer Problems
155