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The printer may have been the target of an electrical event such as a voltage spike or surge, and has been lost. You can try to unplug it from the power, unplug it from the computer, and wait 2 minutes. I usually push the power button on a printer with issues while it is unplugged to make sure it has lost all stored power. Plug it back into the wall and see if it responds to the power button. If the same thing happens, or if there is no response at all, then you may need to replace the printer. Or contact the company that supports it, If it is under warranty, or a service contract.
Here's an article on 936 and 937 Service Main Drive Motor Errors in the Lexmark website. Just click on this link: http://bit.ly/dtbJKt. If all else fails, the printer may require service. I suggest you contact Lexmark technical support or your local service provider for further assistance. thanks.
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
How to Reset the Photoconductor Page Count on a Lexmark E350d or 352dn Printer ID: ENUS27198
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).
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.
Most likely, the contacts in the printer not touching the chip properly (hence why it works in another printer). A simple gentle 'tweak' would work in this case.
The other possibility is the firmware version of the (offendig) printer being incompatible with the version of the after-market chip you are using. No solution here, other than trying a DIFFERENT MAKE of chip.