J. R. Fox wrote:For anyone planning to keep an HP-LJ any period of time, there are a couple of pocket-sized trouble-shooting guides that are well worth purchasing for around $15. They have all the HP error codes, and can give you a better idea as to what may be indicated by way of repairs.Jordan,Please quote those titles. I am very interested in a hardware guide for my HP 4 Postscript.Manuel Castelao