Brother 5250DN Printer Toner light

need printer service ,some times when the laser unit dirty than u should clean all optical mirror inside laser unit. sometime comes from drum , also if the fuser unit defective, last chance change toner cartridge.

In case of a simple memory glitch, power down the printer, remove the toner cartridge, carefully swing it side to side (the cartridge, not the printer!), reinsert, and power back on.
Hopefully that will do the trick.
As always, make sure your OS as well as your drivers are all up to date.

I spend a lot of time with these printers at work and hate them with a passon, they are always breaking.
I have had this same thing happen to me several times and here is how to fix it. This is a fix for the Brother 5250DN.
1: Turn off power and remove toner/drum
2: Tape the little spring loaded lever just inside the printer on the upper left hand side in the *DOWN* position! Do not replace drum yet and...
3: Turn power on to printer and let it cycle. Status/Toner lights will come on as usual.
4: Turn off printer, remove tape from lever, replace drum and turn back on.

Try this....
1: Turn off power and remove toner/drum
2: Tape the little spring loaded lever just inside the printer on the upper left hand side in the *DOWN* position! Do not replace drum yet and...
3: Turn power on to printer and let it cycle. Status/Toner lights will come on as usual.
4: Turn off printer, remove tape from lever, replace drum and turn back on.

When the toner light is on this means the toner is empty and needs to be replaced before it can print again. Replace the toner and you will be able to print again.

Try this....
1: Turn off power and remove toner/drum
2: Tape the little spring loaded lever just inside the printer on the upper left hand side in the *DOWN* position! Do not replace drum yet and...
3: Turn power on to printer and let it cycle. Status/Toner lights will come on as usual.
4: Turn off printer, remove tape from lever, replace drum and turn back on.

I just had the same problem. We have several of these in our office, but switching toner cartridges made no difference. Then I saw this site: http://www.oasis-imaging.com/images/pdf/cart_inst/TN580.pdf

I did steps 14-16, which takes 5-10 minutes. I put the toner back in the printer, turned it on, and it works perfectly now. Give that a try!

Try Staples or www.brother.com

I just had the same problem. We have several of these in our office, but switching toner cartridges made no difference. Then I saw this site: http://www.oasis-imaging.com/images/pdf/cart_inst/TN580.pdf

I did steps 14-16, which takes 5-10 minutes. I put the toner back in the printer, turned it on, and it works perfectly now. Give that a try!

The following worked on the 3 of our HL 5250DN printers that stopped printing for no apparent reason with both the status and toner lights on:

1: Turn off power and remove toner/drum
2: Tape the little spring loaded lever just inside the printer on the upper left hand side in the *DOWN* position! Do not replace drum yet and...
3: Turn power on to printer and let it cycle. Status/Toner lights will come on as usual.
4: Turn off printer, remove tape from lever, replace drum and turn back on.

After hours of working on one of the printers, virtually taking the entire thing apart and replacing fusers, toners and drums, I accidently stumbled onto this sequence. When I tried it on the other 2 printers, Voila! Took like 1 minute each. It must cause some kind of reset of the toner detection switch.