A user reports that their laser printer, which has been reliable for two years, is now producing printouts with toner that is not properly adhering to the paper, and can be smudged off with a finger. Given that the printer is not displaying any error messages and there is no evidence of loose toner inside the machine, which is the most likely cause of this problem?
The toner cartridge is low and needs replacement.
The transfer belt is misaligned or malfunctioning.
There is cold background all over the paper.
The fuser assembly has become faulty and is not heating up sufficiently.