usually when the machine eats up the toner, you have to replace the pcdu of that colour, it happened to me a few years ago on mpc2003 with yellow, (I...
you can notate bad hhd when you load the address book in wim, that load very slow, anyway a bit time ago , sc672 by bad hdd its happen also to TULIO...
it's the first thing I did, and I found solutions like "turn it off and on" or "unplug and plug in the formatter", but since the customer is very far...
well...I don't understand what machine it is? however, if it's physically possible, try to swap the drum cylinder and the charge unit from yellow to...