Even when I replace the toner it still says no toner
SOURCE: MFC-9420CN
There is no 9 4 2 0 cn machine from brother.
Anyway if you run a ink printer from brother have a look around here:
http://welcome.solutions.brother.com/BSC/public/us/us/en/faq/faq/000000/000200/000053/faq000253_008.html?reg=us&c=us&lang=en&prod=mfc420cn_us&Cat=16
SOURCE: brother printer mfc-9420cn says to
when you open the front cover, there is a waste toner tank on the bottom right side of the printer.
Remove the tank and chuck out the waste toner, wipe the tank clean with a cloth and slide tank back in position and close the cover.
this wil resolve the message on the screen
SOURCE: Replacing Toner
How to tell on brother mfc-8440 or mfc-9440cn , the total copies printed so far
SOURCE: Error message after installing new tonner
Check the little switch/door on the left hand side of the drums.
This has worked successfully for me.
Symptom:
After replacement of a C3530 Image Drum, the message, "Toner Sensor Error" is displayed.
Cause:
The plastic shutter in the ID is fully or partially covering the toner sensor window.
Resolution:
Move the cover upward to allow for the sensor to become fully exposed prior to reinstalling the drum.
SOURCE: Mfc 9420Cn printing but marking black line on
try making a copy off of glass. if black mark is gone, then you have to clean the narrow strip of glass to the left of big glass.
hth,
razors
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Toner replacement
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