I am getting a very loud buzzing sound when i switch on the printer - and it only stops once I open the front panel exposing the laser toners. I also notice that large parts of yellow ink are thrown onto the black screen like flat surface
Does this mean my laser toner for yellow needs replacing?
The noise might be caused because the printer is unstable e.g. the stand is slightly wobbly. I moved mine to a file cabinet and resolved that problem. As to the toner--it sounds like your cartridge is defective. I have just had that happen with a yellow cartridge in one of mine. I'm trying to resolve it with Xerox Direct, where I purchased it. If any of the toner cartridges need replacing, you will get a message telling you so--and the printer won't work at all if any one of the cartridges is too low. I'd suggest ordering a new yellow cartridge, as the one spewing toner will soon cause the printer to cease printing until it is replaced. I hope that some of this helps.