I hope someone can help. There may be a really easy answer for this.
I have a Phaser 540, and i was wondering how i can find out how much toner is left in the cartridges.
Unfortunately the 540 did not utilize the "gas guages" as they did for the later model laser,i.e. 560,740,750 printers. From my memory the only thing you can rely on is the toner low/empty message on the front panel. The consumable page will probably only show you an "OK" reading.
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