My Dell 1720 copies tells me it has stopped because the photoconductor kit has stopped working. I just replaced everything and keep getting the same error.

If the drum cartridge has not been replaced, it must be replaced before resetting the counter to avoid damaging the printer.

1. Power off the printer.
2. Open the front door.
3. With the front door open, hold down the Continue button while powering on the printer.
4. Keep holding continue until all lights start flashing then release the button.
5. Once only the Error light is on, close the front door.
6. At this point Continue, Ready/Data, Toner Low, and Load Paper should all be lit.

1. Wait for the printer to make a sound as though it is about to print something. (This may take a minute.)
2. Press Cancel 4 times SLOWLY (1 second between presses) to cycle through lights until ONLY the Toner Low light is on. (It may take more than 4 presses.)
3. Press and hold Continue until all the lights cycle through and go back to Toner Low
4. Cycle power on the printer.
5. Press and release the Continue button to print out the settings page. Under Cartridge Information it should read Photoconductor: 0K