Dell 1720 flashinf replace drum- error.

You need to replace. It is also called the drum unit.

http://www.nextag.com/dell-1720-photoconductor/shop-html

If I could be of further assistance, let me know. If this helps or solves the issue, please rate it and give a testimonial for my response

Thanks, Joe

I’m happy to assist further over the phone at https://www.6ya.com/expert/joe_8b8c2cd6ce148309

The photoconductor kit is another word for the drum or imaging drum. All three words refer to the same part.

Here is a link from the Dell site for this model.
http://accessories.us.dell.com/sna/PopupProductDetail.aspx?c=us&l=en&cs=dhs&sku=310-5404

Once you replace the drum, the printer has to be manually reset. If this is not done, the printer will continue to give this print out. By resetting it, the counter is set back to zero. The drum is good for around 30k prints.

From the Online Manual for the 1700, to reset the counter:
http://support.dell.com/support/edocs/systems/1700n/en/index.htm#online_documentation

To reset the counter, press and hold the Cancel button until all lights flash in sequence.

NOTICE: Resetting the imaging drum's counter without replacing the imaging drum may damage your printer and void your warranty.

Not sure about the part #, but photoconductors and imaging drums are the same thing.

The Drum which is a separate part has reached it's end of life. WHen you pull out the toner cart, you press a little button that separates it from the drum. that drum also comes out. You can tell it's the drum becuase of the green roller. You can go to support.dell.com for info on removing the drum if you don't have the manual.

*Note* When you replace the drum, there is a procedure for resetting the drum count. The printer doesn't actually know you replaced the drum. You basically have to tell it. Now this trick will get the printer working right now with the old drum. However, you still need to get it replaced.

THis link will tell you how to replace the drum and reset the count. The directions are for the 1720, however, it will work for the 1710 as well.

http://support.dell.com/support/edocs/systems/prn1720/en/1720_en/en/d0e4183.html#maintaining-your-printer-chapter

There should have been instructions with the replacment drum unit, for resetting the drum counter.

If not check your manual, or if you can't find it, download ot from Dell website

After replacing fysicalythe photoconductor/imagaging drum, leave the door open. Press and hold Cancel untl all lights flash in sequence to reset the printer. Close front cover.

...so replace the photoconductor...pick one up at any office supply store.

The second link was the helpful information. Also, to cut through all of that --

If you need to reset the counter:

1. Remove drum kit with toner

2. Make sure all print jobs are flushed otherwise whatever has been sent and not printed will come spewing out.

3. Hold down CANCEL Button until all lights flash through.

4. Slide the drum kit and toner properly into the Printer.

done.

The drum collects used toner for apprx. 30,000 pages. After that, the printer recommends that it be changed to prevent used toner from spilling internally into the printer's mechanisms. The whole photoconducter/drum can be replaced. The new part from Dell is apprx. $50.00 US. 
http://accessories.us.dell.com/sna/products/Printer_Accessories/productdetail.aspx?c=us&l=en&s=dhs&cs=19&sku=310-8710#Overview

You might have reset the "counter" for the photoconducter. Ever  have a water  fillter with an electronic timer? You replace the filter, then you reset the timer? Perhaps you reset the timer without actually replacing the filter. So to speak. :)
The question you should ask yourself is: would I like to spend $30 - $60 [it's cheaper for refurbished parts- Google it] replacing the drum head on a 7 year old printer, or would I rather invest that in a new printer?

Leave the printer on. Open the front and hold down the cancel button until all the lights are flashing in sequence. Close the front while still holding the cancel with the lights flashing and then release the cancel button. This should reset it.

Thanks