I have a 4000 and I acquired, for free, a 4800 which is fully bleeding Cyan over all the printing area... basically, whether you ordered it or not (i.e.: even in B&W), it covers with cyan 100% of printing area. My guess: print head issue. The part is $395.
So I thought I should keep it and put the 4000 head into the 4800 since it's the same part.
Question: can I do it myself? How difficult is it ?
Second question: could it be some other problem?