Presario 1400 Series
Models: XL240, XL241, XL242, XL244, XL245, XL246, XL247, XL250, XL340, XL341, XL342, XL343, XL344, XL345, XL346, XL350, XL352, XL355, and XL356
Solving Display Problems
This section lists some causes and solutions for common Notebook display and external monitor problems.
You can perform a monitor
1.Turn off the monitor.
2.Turn off the Notebook.
3.Disconnect the monitor signal cable from the Notebook.
4.Turn on the monitor and allow it to warm up for one minute.
The display should appear white. On the left and right sides of the screen, a narrow black border may also be present. If the display screen indicates either of these patterns, the monitor is working properly.
Solving Display Problems
Problem
Screen is dim.
Screen is blank.
Display is blank and the Suspend icon is flashing.
Internal display is blank, but the screen on an external monitor displays information.
Internal display flashes or has garbled characters when the Notebook is connected to an external monitor.
Continued
Probable Cause
Brightness control is set too low.
Notebook screen is in direct light.
Screen save was initiated by Power Management due to lack of user activity.
Display has overheated.
System is in Suspend mode.
Display function was switched to the external monitor.
Used 1024 x 768 or higher resolution on external monitor and toggled back to internal display, which supports up to 800 x 600.
Solution
Adjust the Brightness of the display by using Fn+F7 or Fn+F8.
Tilt display or move Notebook.
Press any key or touch the TouchPad.
If the Notebook is in direct sunlight, move it to shaded area and allow it to cool off.
Press any key or touch the TouchPad.
Use Fn+F3 to switch between LCD or CRT.
Restart the Notebook.
24 TROUBLESHOOTING | PRESARIO NOTEBOOK MAINTENANCE AND SERVICE GUIDE 1400 SERIES |