Pack it up and try another make or model.
I've got a used Epson 1240U scanner. It seems to work fine except for a problem I just noticed as I was trying to scan some drawings. In any setting I try, the scanned image matches up perfectly with the original heightwise, but is slightly stretched in width, progressively more as one moves left to right on the image. In other words, the left side of the scanned image matches the original fine, but one moves toward the right side of the image, the scanned lines are more and more to the right of the lines on the original. By the right side of the drawing, the lines are off by at least an eighth of an inch.
I'm hoping this is a software problem, but I'm fearful something is bent in the scanner. Any ideas. Any help is appreciated.
I've got a USB connection, a Intel-based MacBook running 10.4.11 and I'm printing using an HP Photosmart D5069 printer.