Thanks Cyberat_88. I couldn't see any other forum section, but then, I am new to his site - so apologies. I've tried all the HP sites and forums and they only address lines on the scanner and other things, not an irregular 'stain'. It's definately in the scanner because when I scan a blank sheet of paper, it scans and prints the 'stain'. From what you say, I suppose I will have to try to find a Printer Repairer - not easy for an Aussie in the wooly wilds of Indonesia! Thanks for you input, anyway. I appreciate it.
Thank you, too, swifty_morgan. Definitely not a watermark - more like a blotch.
ROY