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Have you replaced the old black toner with a refilled toner cartridge?
Is the new black toner that you have put in, in fact a genuine OEM-original Ricoh-made toner cartridge?
OK. That means a more serious problem has occurred.
If it's not a 'compatible' cartridge, then is it the right cartridge # ***** this machine?
Resets are inadvisable for this machine, in this sort of case. The best thing to do is, to either put out a service call on the machine, try another new genuine black toner (in case the one you put in is defective - in which case if the next one worked, you'd send that defective one back as defective, for a refund or another new one), or else try to replace the toner pump yourself.
(If I were considering that last alternative, I would clean that area first, in case a sensor is occluded that picks up the new cartridge or its status. Esp. I would advise, in any case, taking a clean dry rag cloth, and wiping any electrical contacts, metal and either silvery, coppery, or gold (but nothing that is shiny and bluish-green! that would damage it if you touched it with a cloth), that are in the area of the black toner cartridge.)