Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
If the black toner was not fusing to the paper, but the color toner was doing just fine, then you didn't and do not have, a fuser problem.
What you would have in such a case, is a toner problem. Specifically (I suspect) the black toner might be a cheap refill, and the toner the cartridge for the black color was refilled with, might be sub-standard toner powder, and not formulated to fuse properly at the CP105b fuser's usual temperature range.
As for a black image repeating... the reason for that problem is uncertain at this point. But, it could possibly be caused by substandard toner, as well as other things.
Also, look on your settings: in the
tab, make sure that the
Repeating images may also be related to problems with 'doctor blade' or 'scraper blade' function, and also may indicate voltage supply problems, spilled toner on contacts, etc.
As for the orange warning light... you have to replace that cartridge (black) anyway. Also try pressing buttons on the panel, esp. the Cancel button if there is one.
In short, some of the problems you report may be owing to use of different (and/or refill, and/or substandard) toner for the black color. But there may be other problems... let me know what you think, and I will advise you further as appropriate to the actual details of the situation.