My printer lexmark e352 shows an error code 84 replace fotoconductor unit. How to reset this error code

84 Replace Photoconductor
This message displays when the photoconductor is at the end of life.
The photoconductor must be replaced.

84 replace photoconductor on the display indicates that the photoconductor has reached its expected life rating. You may continue to print but will be at risk for developing print quality issues. It is recommended that photoconductor unit be replaced. After replacing a photoconductor unit, you will also need to manually reset the PC counter,

• Instructions on how to replace photoconductor unit available at http://bit.ly/aykTXL
• Instructions on how to reset photoconductor counter available at http://bit.ly/9WAvUK

Thanks

84 PC Life Exhausted indicates that the photoconductor unit has reached its functional life. The photoconductor kit will need to be replaced. The printer will not function so long as the Exhausted message remains on the display. The only way to clear the message is to install a new photoconductor. After replacing the photoconductor unit, you need to manually reset the pc page counter as well. Thank you for choosing Lexmark.

The error indicates that the yellow photoconductor (pc) unit has nearly reached its rated life. You can still continue printing but will be at risk for developing print quality issues. It's advisable that yellow pc unit be replaced.
NOTE: When a pc unit is replaced, you will also need to manually reset the pc page counter as well.

NOTE: Resetting the photoconductor counter/page counter should only be done whenever you replace the photoconductor unit.
Here's an article in the Lexmark website on how to reset the photoconductor page count. Just click on this link: http://bit.ly/9WAvUK. Hope this helps.

Instructions for resetting photoconductor count on E450

http://support.lexmark.com/index?page=content&id=HO3155&actp=search&viewlocale=en_US&userlocale=EN_US&segment=SUPPORT&productCode=LEXMARK_E450DN&searchid=1269982667366

Go to www.lexmark.com Select the correct country. then Selectg "Technial Support" Enter the model of your printer "E350D" Click on search. Under the "Knowledge base" header place this number into the search bar: "ENUS27198" click on search. ************************* Lexmark E350d Country / Region: United States Language: English Need to download a driver? How to Reset the Photoconductor Page Count on a Lexmark E350d or 352dn Printer ID: ENUS27198 Procedure Follow the steps in the table below to reset the photoconductor (PC) page count. NOTE: The directions in this article are in English. To download a PDF file containing these instructions in several other languages, click here (file size: 782 KB). Step Action 1 Enter the printer's Configuration menu: Power off the printer. On the printer's operator panel, press and hold the select button () and the back button (). Power the printer back on while keeping both these buttons held down. When you see the messages Performing Self Test or Busy on the printer screen, you can release both buttons. If the printer has successfully entered configuration mode, you will see a new menu with the heading CONFIG MENU at the top of the screen. 2 Press the right arrow button () until you see Reset PC Cnt. Press once. You will see Reset. Press again. The printer will display a Resetting PC Count Value message and go back to the previous screen. 3 Press once. 4 Press or on the operator panel until you see Exit Config Menu. Press once. Selecting this will cause the printer to reboot. If the counter has been reset correctly, the printer should return to a Ready prompt. 5 If this does not clear the PC Life Warning or Replace Photoconductor message, power off the printer and attempt this entire procedure again. If the error remains after two attempts, confirm that: The correct photoconductor unit is installed. The part number on the photoconductor unit should be E250X22G. If it is not, install the correct photoconductor unit into the printer. The photoconductor unit has not been refurbished by a third party or is not damaged in any way. If the photoconductor unit was refurbished by a third party or appears to be damaged, try replacing it again before seeking service on the printer. If the error persists, the printer may require service to correct the issue. Contact Lexmark Technical Support for more information. Don

WHAT IS 84 REPLACE PHOTOCONDUCTOR

the problem is that you need to reset the counter of the photoconductor unit. From the official site of lexmark, i find this solution.
Step Action 1 Enter the printer's Configuration menu:

1. Power off the printer.
2. On the printer's operator panel, press and hold the select button () and the back button ().
3. Power the printer back on while keeping both these buttons held down.
4. When you see the messages Performing Self Test or Busy on the printer screen, you can release both buttons.
5. If the printer has successfully entered configuration mode, you will see a new menu with the heading CONFIG MENU at the top of the screen.

2 Press the right arrow button () until you see Reset PC Cnt. Press once. You will see Reset. Press again.
The printer will display a Resetting PC Count Value message and go back to the previous screen.
3 Press once. 4 Press or on the operator panel until you see Exit Config Menu. Press once. Selecting this will cause the printer to reboot.

If the counter has been reset correctly, the printer should return to a Ready prompt.
5 If this does not clear the PC Life Warning or Replace Photoconductor message, power off the printer and attempt this entire procedure again. If the error remains after two attempts, confirm that:

• The correct photoconductor unit is installed. The part number on the photoconductor unit should be E250X22G. If it is not, install the correct photoconductor unit into the printer.
  
• The photoconductor unit has not been refurbished by a third party or is not damaged in any way. If the photoconductor unit was refurbished by a third party or appears to be damaged, try replacing it again before seeking service on the printer.

If the error persists, the printer may require service to correct the issue. Contact Lexmark Technical Support for more information.

Reset Procedure(s) after putting in new Photoconductor kit
Resetting the Lexmark E340/342 (display type) machines
1) Turn the printer off
2) While still off, press and hold the SELECT and RETURN buttons.
3) Keep both buttons pressed, and turn the printer on. Continue to hold both until either “Performing self test” or “Config menu”
appears on the display.
4) Release the two buttons
5) RESET PC CNT should now show on the display. If it does not, press the left or right menu buttons until it does.
6) Press the SELECT button once. “Resetting PC Cnt Value” should show on the display.
7) When the display shows CONFIG MENU again, turn the printer off.
8) Turn the printer back on. (Do not hold any buttons down this time). The printer is reset.
You can confirm the counter was reset by printing a “menu settings page”.