ViewSonic EA771B User Guide - Page 24

Problem... Possible Cause... Remedy... Image is scrollng or unstable Scanning frequency outside acceptable range? Reconfigure the graphics board. Image is not centered, Horizontal, vertical positioning too small or too large or horizontal, vertical size? Adjust the horizontal, vertical positioning and size controls. E Characters appear Brightness and contrast Adjust brightness and N dark at minimum? contrast. G L Color is not pure Build-up of magnetic fields Use the degauss function to within the monitor? clear or degauss the magnetic S fields. (Pages 9 and 13) H Magnetic object nearby? Reorient object or monitor. Signal connector pin assignments incorrect? Use correct signal connector. Image bounces or has wavy oscillations Signal cable properly connected? Magnetic object nearby? Electric power wiring nearby? Connect signal cable properly. Reorient object or monitor. Your office may have electric power wiring behind the wall. Move the monitor. Image is distorted Is the earth's magnetic field interfering with display? Face monitor east for best image quality. 26 Troubleshooting ViewSonic EA771/EA7718