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Brother MFC 7420 All-In-One Laser Printer - Page 6 Questions & Answers
Brother MFC-7420 printing light after installing new cartridge
It could be an issue with the drum unit either being faulty or the internal drum counter having been reset sometime after a new drum was installed. I would recommend removing the currently installed drum unit and trying it in the second printer you mentioned with the toner cartridges that has been confirmed as working.If the problem persists it is likely to be a froblem with a fuser or another internal part that is not traditionally a consumable item. In which case I would recommend contacting Brother or a printer technician.
Printer won't work
What it really means is that another piece of paper is still stuck in the printer, closer to the back. Pull out the paper tray and open the back to look again.
Reset drum for brother
Turn off the printer and open the printer back door. Use a spot light and give look inside properly. Make sure there no paper. Some time small part of the paper creates the problem. So you can do one thing after open the back door, top side etc make the printer upside down etc. So if anything inside that's will come out. After cleaning again connect it with PC and turn on. Now give a look. If you face same problem then Un-install the printer driver and software from the PC. Then restart the PC and Printer both. Now connect the Printer with PC via USB and install again the driver & software. Then try to print and let me know the result.
Brother mfc 7420 software won't install
First unplug the printer from the computer. Go into the device manager, under system in the control panel. You should see some devices listed as unknown device or it may have the printer name with a yellow exclamation mark by the name. Delete any of these that you see. Leave the printer unplugged and restart the computer. When it boots up reinstall the printer software and don't connect the printer until the software says to. It should go right through the install now.I hope this helps, if so please rate my solution.BuddyMc
For the brother mfc 7820N the toner life end pops up and i have tried the *00 to reset and it doesnt work. What do I do?
When the toner cartridge is exhausted or empty then theprinter will not be able to print further documents or the prints will be veryfaint.You may be able to print a few more pages by removing thetoner cartridge and shaking the toner cartridge in a horizontal position a fewtimes and then placing it back into the printer.This will give you an opportunity to print a few more pages and giveyou time to purchase a new toner cartridge for your printer. A cheaperalternative is to purchase a re-manufactured toner cartridge for your modelprinter.A re-manufactured printer cartridge also replaces worn partsas well as refilling with toner powder.
Change of toner
I have a brother mfc
7840wI first used the electrical tape trick and that worked for a while.
Then got the toner low message again. I then tried the *00 trick, which works as
follows:1. lift lid and open front cover2. press clear/back.
"Replace Drum?" will appear on the screen.3. Press "*00" it will then read
accepted and the toner low error (End of Toner Life) should go away.4. close
it all up and your done.
Power supply
if its the HIGH VOLTAGE power supply unit you require, the part number is LJ9708001
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