my laser printer is a Brother HL-5280DW.
Here is the problem: Printed pages fade heavily out, from left to right. Only the first 3 inches from the left are readable.
First, no message on the printer's display announcing the toner is near to empty ever appeared.
Second, according to the printer's own stats, it has printed 6370 pages with the current toner. As far as I remember, one toner cartridge should last for 7000 to 8000 pages.
I already did some basic cleaning of one maybe relevant part mentioned in the manual, the scanner window.
1. Shouldn't the toner last longer since it is way below its expected printing capacity of at least 7000 pages?
2. Is something broken?
3. Can I extend the remaining the life of my cartridge? I already tried to shake it, but it didn't change anything.