Question about Brother HL4040CN Laser Printer
Clean the toner cartridges copper contacts then clean the part where the cartridges sit and while the printer is powered on pull out the power cable from the wall as well as the printer and wait for 30 seconds then reconnect the power cable into the wall socket and then into the printer and re-insert the cartridges and wait and see if the error comes up.
if it still does then I hope you are not using refilled cartridges If you are then your printer may have gone bad.
Try changing the cartridges and check the expiry date if it is beyond expiry that is another problem why you are getting that error.
If the above mentioned fails replace the toners and then check if you still face this issue you need to replace your printer
Posted on Jun 20, 2009
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Posted on Jan 02, 2017
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