Appendix; Troubleshooting - NEC LCD1511M Service Manual

Appendix

Troubleshooting

If you are experiencing trouble with the LCD display, refer to the following.
If the problem persists, please contact your local dealer or our service
center.
Problem: No image appears on screen.
•
Check that all the I/O and power connectors are correctly and well connected
as described in the "Installation" section.
•
Make sure the pins of the connectors are not crooked or broken.
Problem: Partial image or incorrectly displayed image.
• Check to see if the resolution of your computer is higher than that of the
LCD display.
• Reconfigure the resolution of your computer to make it less than or equal
to 1024 x 768.
Problem: Image has vertical flickering line bars.
• Use "Frequency" to make an adjustment.
• Check and reconfigure the display mode of the vertical refresh rate of your
graphic card to make it compatible with the LCD display.
Problem: Image is unstable and flickering.
• Use "Tracking" to make an adjustment.
Problem: Image is scrolling.
• Check and make sure the VGA signal cable (or adapter) is well connected.
• Check and reconfigure the display mode of the vertical refresh rate of your
graphic card to make it compatible with the LCD display.
Problem: Vague image (characters and graphics).
• Use "Frequency" to make an adjustment. If this problem still exists, use
"Tracking" to make an adjustment.
LCD1511M – 12