I have a Brother MFC-9840CDW purchased in 2008. It has been a good printer over the years. In the last few months, the printer has started to give intermittent "Print Unable 32" errors. Sometimes the error will appear repeatedly and refuse to print anything, and then the printer will work fine the next day. Other times, a power off cycle will clear the problem and the printer will print fine. I have checked the printer extensively for any type of jammed paper in the paper path with nothing found, removed everything (toner, drum, fuser, waste toner unit, belt unit, etc.), and done the repair on the sticky "print density" sensor even though it did not appear to be sticking. At this point, I need a working printer and am tempted to just replace it. The only reason I am hesitant is that it has a fairly new set of high capacity Brother OEM toner cartridges (set cost a little over $400), plus the reviews on new printers seem to indicate much poorer quality these days. Does anyone have ideas on what else could be causing the error? Has anyone had this error caused by the belt unit (BU-100CL) or waste toner (WT-100CL)? I am tempted to try replacing those parts, but don't feel like continuing down this path if it is a lost cause.