After much research, I have determined that the Error 41 on the Brother MFC5100C is a common problem. The machine is out of warranty, so no help from Brother, although there are hundreds of posts on the internet about the same problem. Apparently, it is caused by a print head problem. I've cleaned and replaced the print head. I'm trying to find the Brother error service codes to try to clear the error. I will never buy another multifuntion unit as when one thing goes, it is completely useless. Live and learn. Thanks for reading my message.