I did some Googling and found the following suggestion at TechSupport Forum. Scroll down the page to see all entries and feedback. Hope this helps. Brother Laser Printers - Error Message "Toner Life End" Brother Laser Printers Error Message "Toner Life End" MFC-7440N MFC-8460N. Brother suggest taking the unit to a service center. Message doesn't go even after replacing BOTH Toner & Drum. Try this Open door press Clear/Back key press *00 press OK Do not choose anything for drum replacement. When drum replacement menu comes up, press the * and then 00, then press OK. This might well work for other Brother Laser Printers too Here is a link that might be useful: TechSupport Forum

The latest high end HP all-in-one printers have fixed ink jets and separate ink cartridges. Both types of HP printers, ink jets on the cartridge and fixed print heads, can be found. Clogging of ink jet heads has always been a big problem and that is why initially, HP started with the print head on the cartridge. It was a patented feature. Later, HP develped a way to keep fixed print heads clear, and then they began to introduce fixed print head printers. Your grainy prints can have two root causes: 1) Poor scan and resultant poor file; 2) Poor printing of a good or bad file. I have an HP flat bed scanner that is going on 10 yrs old and that is the one I rely on when I need to have total control of a scan. it has a rugged mechanism and still produces excellent results. My last two HP all-in-one printers have done excellent work when copying photos. Both of these have fixed print heads. The alignment sensor failed on my first HP all-in-one otherwise I'd still be using it. I can't complain. I had run 11,700 pages through it. I discovered that the ink cartridges were being phased out for this printer (type 02) do I decided to update to a later printer. Glad I did. Although there are fewer cartridges, color prints are just as good and the ink has better smudge resistance.

pk, yes, frustrated is an understatement. Don't like spending so much time on such things that are probably easy. Did a lot of research with no resolve. Printer is hooked up to a desktop; DT hooked up to router. I don't "think" the printer is connected directly to router. Not sure what ethernet is. Laptop works wirelessly to the printer. Laptop is 8 mos old. Was working perfectly fine with printer until this new router was installed the other day. I have not tried plugging the printer directly to laptop. I'll try that in the morning. Brain is fried right now so I'll continue on this quest in the morning since I need the printer for work. Thanks for the help. Wonder if uninstalling the computer software from laptop, then reinstalling it again, will work.

OKI Electric developed its LED printhead technology for electro-photographic printing for reliable printing in various applications. Laser systems rely on elaborate combinations of rotating mirrors and lenses that must remain in alignment through use. The laser scans from one end of a line to another, then zig-zags down to the next line. LED technology uses a Light Emitting Diode printhead as a light source within the imaging device. Unlike laser systems, the LED printhead is solid-state and has no moving parts. The LED bar pulse-flashes across the entire page width and creates the image on the print drum as it moves down. OKI also has a straight-line paper path that's less susceptible to jams when feeding heavy stock, envelopes or labels. LED technology is the future. We're so sure of this that we guarantee the printhead of every OKI page printer for five full years  by far the longest warranty in the industry! That's the difference, that's a very good printer you have there print quality and reliability and can be used in a work group more then 1 person using it so it is built to last. Did you like the printer when it worked if so fix it and it will probably out last the the ones you listed.. Lets see what others say, I currently use a brother all in one model MFC 7420 and happy with it. Tech Infomation copied from oki web site, found by Googling "led laser"