I have a Laserjet III that has developed a tiresome fault.
When first turned on and after selftest etc, trying to print will cause the printer to appear to start printing and feed the paper. It will then stop show an error of 51 and then produce one sheet of paper with 2 horizontal smudged lines one third of the way down.
Nothing will get to restart except turning off, opening the top, pull the cartridge out and in again, and then turn on. It then sometimes, about 20% of the time, start working.
I have replaced the cartridge and have cold-reset. The printer has fairly low usage in the past but it is still a good printer and am loath to get rid of it
Anybody have any ideas???