I realise this is an old post that I have come across but as it relates to a recent problem of mine thought I would add to the thread:
This is strange advice given my own recent experience. While I could print fine (ink level low) when printing from laptop scan, when I tried to print manually (which I have done many times) - sheets just came out blank on both just black and colour. This of course prompted me to change the 'low level' cartridges earlier than I need have done - thereby not using all the ink that was clearly still in them. The printer then worked fine - despite my having removed them ' early'.
In fact it seems that doing a reset is the answer to this problem. A one line solution kindly provided by R Hooper.
