I am attempting to install some new toner in my Brother HL-L3210CW printer, and it keeps giving me a "No toner" error. Besides all the really obvious things (turning the printer off and back on, taking the toner out and putting it back in, cleaning the corona wire), I've also tried entering the toner reset menu using the machine's control panel, but when I get to a cartridge and attempt to press the up arrow to choose "reset," nothing happens (that button is working fine when I try it for other functions so it does not appear to be a problem with the button itself).