I've replace the drum for printer (samsung scx-4521f) and it still says the [toner empty] how do i solve this?

Replace the toner not the drum.I've replace the drum for printer (samsung scx-4521f) and it still says the [toner empty] how do i solve this?
I think for that model the toner and drum are separate. This means you still need to get the toner.I've replace the drum for printer (samsung scx-4521f) and it still says the [toner empty] how do i solve this?
You replaced the wrong thing. Replace the toner.