Problems With Image Quality - Epson Expression 800 User Manual

You cannot scan images at all or only a few dots appear in the scanned image.
Problem
You may have selected
incorrect scan settings.
Images are very dark and without details.
Problem
Some EPSON TWAIN
Pro settings may be set
incorrectly.
Troubleshooting
Solution
Select different EPSON TWAIN Pro settings. You may have selected an
incorrect Image Type or Destination setting, or the Exposure,
Highlight, and Tone Correction settings may be inappropriate for your
image. If Image Type is set to Line Art, try decreasing the Threshold
setting.

Problems with Image Quality

Solution
If the Halftone setting is available, make sure it is set to a halftone mode,
not to None.
Check that the Destination (output device) is set correctly. Try setting
Destination to Screen or Screen Vivid if your printer isn't listed.
Change the Exposure, Tone Correction, and Shadow settings to
lighter values and scan the image again.
Some application software does not support 36-bit color. If you set your
Image Type to 36-bit Color, change the setting to 24-bit Color. Then
scan again.
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