Not quite sure where you are at, but I can say that my 6100 will go from being 100% great, to getting a message that says to do a cleaning on the printhead and if it fails to make the message go away then to replace it. There is no point in doing a cleaning, it always has to be replaced in my experience. These machines unfortunately do not tell you how many nozzles have been remapped and hence the health of your printhead. I also remember reading here that the open top cover problem has come up and been related to either a board issue, or something else, but the connection between the top cover message and some major issues has been discussed quite a bit. Sorry I can't be of more help, but my guess would be the printhead needs replacing and I doubt you have been able to do anything with it after getting that message.
