Ricoh 4220 copier. I replaced toner cartridge and

I suggest removing the toner, and visually inspecting it, make sure the sealing tab has been removed, give it a really good shake, as the toner may have settled in storage. re-insert the cartridge making sure it goes in the right way.


If you can hear a slight 'clicking' noise it's adding toner and pumping it into the developer unit, some machines take 2 minutes, some take 6..

Failing that, lift the platen cover and do a few black copies, so you force the machine to add toner.

Goodluck.