This seems to be a frequent problem with Lemark 4550 the internet is full of the same problem and so far i havent found an answer anywhere - am desperate as run a small charity and need computer and printer daily. any help welcome?
Yes, I found the same thing - it always seems to be the right cartridge that causes the problem. Could you try replacing the colour cartridge from your supplier in case it is faulty? Otherwise maybe contact Lexmark Support
This is a maybe about l year old and was working fine till the colour ink ran out and i tried to put in the replacement one. I have checked and it is compatable as the numbers are in the installation brochure from Lexmark. Maybe the cartridge is faulty?
QVC just responded to my e-mail, i bought it in October 07 and this is the first time i have changed the ink. They have given me a number 008 no to phone lexmark and speak to someone. Told them about all the forums with this problem and they say its now discontinued but have taken note.