I have HP Scanjet 5100C. It was working fine until after being idle for a while. Now I get horizontal lines, grinding noise at the end and wrong colors in my scanned image. I followed instructions in unlocking but still does the same. After the scan, when it asks me to accept the image (ugly color usually all yellow, sometimes all green image) or cancel, I cancel & scan again, the grinding noise gets harder & starts from the very beginning to the end. Picture come out worse sometimes it says no image was scanned. I am using the original HP cable that came with the scanner. Please help.