Question about Dell 1720dn Laser Printer

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How to know when the image drum is bad on a Dell Laser Printer 1720dn

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Posted on Jan 02, 2017



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SOURCE: Replaced drum on Dell 1720dn printer. Where is

This should fix the drum light being on that 1720

Turn off the power using the switch on the back of the printer. Open the front door of the printer. Hold Continue button down, power on the printer, and continue to holding Continue down until the LEDs begin to flash. When the LEDs start to flash, release Continue button. The LEDs will continue flashing until only Error LED will be lit. Close the front door. Continue, Ready/Data, Toner Low and Load Paper LEDs should be lit. Wait till the printer completes the POST process. POST is complete when fan noise and rollers stops. After POST wait for 5 seconds Press Cancel button 4 times slowly until the Toner Low LED is lit. This is the procedure resetting the counter. Press and hold Continue until all LEDs begin to cycle in sequence, then release Continue. Now only the Toner Low LED will be lit. Cycle the power of the printer: Remove the power cable - Wait for 5 seconds - Plug the power cable back to the printer - Power the Printer on.

Posted on Jun 03, 2009


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1 Answer

5mm vertical gap dell 1720dn

Any time an imaging drum is replaced on a 1700, 1710, or 1720 model dell laser printer, you must reset
the photoconductor count. The following procedure illustrates how this is done:
1. Open the front access cover
2. Press and HOLD the Cancel Button (Red X)
3. When you see the LED's 'Chase' turn the printer off
4. Close the access cover, and turn the printer back on
5. Press the Continue Button (Green Triangle) to print a settings report
6. Under the section 'Cartridge Information', locate the item 'PHOTOCONDUCTOR COUNT=0K' indicating 'Zero Thousands'.
s now been reset, and you should now be able to print now ok

May 06, 2014 | Dell 1720dn Laser Printer

1 Answer

Replaced drum but light continues to blink

To reset the photoconductor drum counter, press and hold the Cancel button on the printer until all lights flash in sequence. You can clear the Replace photoconductor message only when the imaging drum has been replaced. For more information on how to replace the drum, see the User's Guide.:

Click on this link or copy and paste the complete link into your browser.

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it.

Thanks, Joe

I’m happy to assist further over the phone at

Nov 11, 2010 | Dell 1720dn Laser Printer

1 Answer

Printer indicates toner and error light have replaced imaging drum and toner still lite

if the imaging drum has been replaced already, you may have to reset the counter for it. To reset its counter, press and hold the CANCEL button cancel_button_0.jpg until all lights flash in sequence, after that, you may need to turn off and turn on the printer and test it again..

Aug 25, 2010 | Dell 1720dn Laser Printer

1 Answer


maybe late, but if in case you continue to have this issue, try this out. reset its counter, by pressing and holding the CANCEL button until all lights flash in sequence, after that, you may need to turn off and turn on the printer and test it again..

Aug 09, 2010 | Dell 1720dn Laser Printer

1 Answer

I replaced the Imaging Durm,but the light is still flashing w/ the error light. It's a Dell 1720dn Service Tag 25MS7D1

Did you reset the counter?
After you replace the imaging drum, you should reset the imaging drum's counter. To reset the counter, press and hold the Cancel button cancel_button_0.jpg until all lights flash in sequence.

I hope this helps.

Cindy Wells

May 20, 2010 | Dell 1720dn Laser Printer

1 Answer

Even after changing new cartridge my print out has black ink stain on page left and right

This is usually due to a dirty imaging drum roller (green roller below toner). Remove the toner / drum assembly, then separate the two. Now slowly rotate the imaging drum roller by hand using the gear on the side of the cartridge (Try not to not touch the drum roller with your hand, as oils from your skin may cause further problems + toner is nasty) Look for toner splotches to the left and right on the drum roller as you turn it. If you see any you can clean them off with a damp paper towel. Then reassemble the printer and hold the continue button down until you hear the printer start then release it; this will print a test page.. Hopefully that will take care of the issue. Also while you got the assembly out of the printer you can clean the glass print-head lens using a clean, dry, and lint free cloth. The print head lense is located within the recessed area in the top of the printer.

- I have seen that happen to a bunch of those printers and that is usually all it is. Let me know if that takes care of it.

Picture of Drum + Print Head lense for a (1720 / 1720DN).
Link to Dell manual about drum & print head.

(Full link below)


May 03, 2010 | Dell 1720dn Laser Printer

1 Answer

Dell 1720 laserjet printer

After you have replaced the imaging drum press and hold the cancel button until all lights flash in sequence.

Any questions leave a comment

Oct 05, 2009 | Dell 1720dn Laser Printer

1 Answer

Two dell 1720dn printers with two different problems.

Call Dell and get the drum count reset instructions. They should tell people this info...but neglect to. :P

Feb 24, 2009 | Dell 1720dn Laser Printer

1 Answer

Dell 1720dn has gray streaks in printing

That green drum is the imaging drum, and it needs to be replaced. You can purchase directly from dell:

After-market replacements are available as well from a number of online sellers. A search on Google will provide many links.

Feb 13, 2009 | Dell 1720dn Laser Printer

3 Answers

Dell 1720dn Error and Toner light on

After replacing the drum unit you have to tell the printer that you've done it(it's not smart enough to figure it out itself). Have the front door open and press and hold the Cancel button on the printer until all lights flash in sequence then let go. Then close door and try.

Apr 09, 2008 | Dell 1720dn Laser Printer

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