If your Hewlett Packard Color LaserJet 2600 or 2605 prints the red (magenta) faint or not at all, the laser scanner assy needs to be stripped out of the printer and cleaned.
HP Color LaserJet 2605 – colors out of alignment.
The symptons of this fault is that the colours appear to be out of alignment. If you look closely at a printout, you will see it is actually the black that is shifted horizontally and the other colours are ok.