HP Officejet Pro K5400 problem

  ernieernie 11:39 13 Mar 09

I have an HP Officejet Pro K5400dn which is refusing to acknowledge new black ink cartridges. I have tried several and the result is always the same - the ink light flashes and the printer won't do anything.
Having waded through the instructions the only advice I am given is to keep re-inserting the cartridge. Having done this dozens of times with new and old cartridges the result is still negative.
I tried a print head clean but that made no difference.
Anyone out there who can help? Please

  ernieernie 11:36 17 Mar 09

After three days of struggling I seem to have conquered the problem by cleaning the outlet of the cartridge with plain water.
It would seem that the problem was caused by dried ink in the outlet - at least I hope that is the reason, otherwise it is sheer luck and I don't like to rely on that.

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