That makes sense except that it is very random and can affect any key. Most recent one was instead of a "g" it was outputting "e"? I went to test on a Word document and it started working correctly again. It is only when I read what i have typed I pick up the issue.The keyboard keys are usually wired in a matrix arrangement, so several keys will share the same X or Y coordinates. Which can mean that if there's a broken track or dodgy connector several keys on the same row or column will result in the wrong or no recognised output.