Ok the printer is a HP960c, so far its served me well but to night i treid to print something out which had yellow in it and the printer completely ignored the yellow sections of the documents. It left the yellow bits of the paper totally white. It not even like its attempted to do anything but could because of a blockage or lack of ink, theres no evidence of it tried to do somthing on the paper. This is a relitively new colour cartridge to and this is the first time ive needed to print any major colour documents with it since i had it. I just got back from a two week holiday, so im wondering if theres a huge blockage somewhere. ive tried cleaning the cartridge both through my OS and manualy and ive tried priming the cartridge. Ive even tried printing a whole A4 in yellow using high link levels, to try and force and blockages which may be there out some how, but no, not a spec of yellow was printed. To be honest it doesnt look like there was ever any ink on the print head any way. Its completely clean on the yellow side (the print head is built into these cartridges). Any ideas what could be wrong. Ive treid everything i know. Its a rather annoying problem to have especialy with a new cartridge.