I have a designjet 100. Two days ago the print head needed replacing. I ordered and installed a new black printhead and since then the icon on the printer status display has not stopped flashing. On occasions I have managed to print a test sheet but not a proper letter. I contacted HP who said that the print head must be faulty. I have downloaded HP system maintenance and the new firmware - S.05.03 fmw, I have tried to align printheads and clean printheads. Each time I get a sheet with a printed green/grey bank across the top left half of the page.

I would appreciate any suggestions

Did you have the cartridge refilled or did you order a new HP cartridge?

If HP says the cartridge is defective, get the cartridge replaced either by the point of sale or HP.

Did you have the cartridge refilled or did you order a new HP cartridge?

If HP says the cartridge is defective, get the cartridge replaced either by the point of sale or HP.

I have the same problem with my Designjet 100 - the black printhead keeps flashing.

I replaced the printhead not the ink cartridge with a genuine hp 11 - but is still flashing

Any suggestions