Hp. color laser 8550 printer already replaced 2 imaging drum units, still asking for image drum, is there any way to reset this drum counter, before using a 3rd drum? Thanks

Imaging drum reset chip Ebay £15
http://www.ebay.co.uk/sch/i.html?_odkw=Imaging+Drum+reset+chip+for+Samsung+Xpress+SL+C410W+Xpress+SL+C460FW+SL+C460W&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313.TR0.TRC0.H0.XImaging+Drum+reset+chip+for+Samsung+Xpress.TRS0&_nkw=Imaging+Drum+reset+chip+for+Samsung+Xpress&_sacat=0

When you replace the image unit for the color that needs to be replaced then the chip on the NEW IMAGE will tell the printer good to go.

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

when you replaced the image unit did you reset the counter for the drum

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 until all lights flash in sequence, after that, you may need to turn off and turn on the printer and test it again..

(from Okidata's support site)

After replacing the image drum cartridge, reset the drum counter to keep a correct count of the number of pages printed on the image drum.
1. Turn the printer on while holding the MENU 1/Menu 2 button. USERMNT displays in the control panel window.
2. Press MENU 1/Menu 2 three times. DRUM CNT RESET displays.
3. Press ENTER. The counter will reset and the printer will go ON-LINE.

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 until all lights flash in sequence.

I hope this helps.

Cindy Wells

After replacing the image drum cartridge, reset the drum counter to keep a correct count of the number of pages printed on the image drum.
1. Turn the printer on while holding the MENU 1/Menu 2 button. USERMNT displays in the control panel window.
2. Press MENU 1/Menu 2 three times. DRUM CNT RESET displays.
3. Press ENTER. The counter will reset and the printer will go ON-LINE.

Imaging drum is empty or missing (Error 40204) Light pattern Description The imaging drum is empty or missing. The imaging drum light is blinking, and then printer stops printing. An error 40204 is written to the event log. The printer cannot detect the imaging drum correctly. Action

1. Reinsert or replace the imaging drum.
2. If the imaging drum light is still blinking but the Attention light is not on, turn the printer off, and then back on.
3. Repeat Steps 1 and 2 with a new imaging drum.
4. If the problem continues, contact HP Customer Care at http://www.hp.com/support/clj2550 or see the flyer that came in the printer box for other contact information.

Imaging drum e-label reader is faulty (Error 10004) Light pattern Description The imaging drum light is blinking, and then printer stops printing. An error 10004 is written to the event log. The imaging drum e-label reader is faulty and the printer cannot detect the imaging drum correctly. Action

1. Reinsert or replace the imaging drum.
2. If the imaging drum light is still blinking but the Attention light is not on, turn the printer off, and then back on.
3. Repeat Steps 1 and 2 with a new imaging drum.
4. If the problem continues, contact HP Customer Care at http://www.hp.com/support/clj2550 or see the flyer that came in the printer box for other contact information.

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

Re you using genuine HP NEW cartridges? If not, you must make sure that whoever has re manufactured the ones you are using has replaced the chip on the cartridge. This tells the machine how many copies are on the cartridge.