> Does anyone have any ideas how I could put this right? > > Here's what I've tried so far. > 1. Set the printer on a firm surface, with no sideways wobble. > 2. Cleaned the rod the print head slides along. > 3. Tried a different USB cable. > 4. Tried a different USB port. > 5. Tried a different Epson 740. > The problem persists.
Have you tried a different ink tank or done a print head cleaning,.. at least a nozzle check. Hmm... Might be a timing issue with the print-head motion. You cleaned the printhead slide but did you lubricate it? You can get a synthetic lubricant that might help...
here is where I got mine http://www.fixyourownprinter.com/specials/misc/chemicals/S93
