How do I tell the HP2600n to use all the toner in each cartridge? I don't want it to stop after an arbitrary number of copies. Thanks, Mel What you need is a new chip for the cartridge, Here ya go,
http://www.ink-refills.net/laser-toner-refill-accessories.html probably find the same thing cheaper on e-bay watch the shipping prices and look for a power seller! I don't know how much is left in the toner cartridge so it might not be cost effective to put in a new chip with out refilling the cartridge. Google HP 2600n reset chip and see what you come up with.