Beating Noise emanating from the Printer Brother MFC8840D
Laterly theres been a beating noise coming from the cartridge or somewhere which is loud and irritating, that have triggered us to off the printer. This started after the comment "Change the drum" appeared on the printers screen. We are not able to print also. I would appreciate if anyone could help me out on this issue.
Worked on one of these today that had a broken gear on the fuser. It takes about 8 screws to pull out the fuser fom the back of the machine, but the gear is visible with the fuser removed. If it is broken or teeth missing, I found a new one at precision roller for $129.00. They offer the gear only but I didn't want to take the time to replace it and other parts were worn anyway.
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It's locked up because of a thread jam. See this page for more info. http://welcome.solutions.brother.com/BSC/public/us/us/en/faq/faqh/000000/000000/000068/faqh000068_000.html?reg=us&c=us&lang=en&prod=hf_es2000teus
Loosen the two small screws under the flash on the swivel head. Turn flash on. You may need to twist the head just slightly. Flash bulb moves back and forth in the swivel head when zooming. If you dropped the flash, this may have jarred it from the track. I had the same problem with mine, and the above solution fixed it. Zoom works again and no clicking noise. Let me know.
For a possible fix to the Brother HL-2140 squeal/squeak/noise problem open the printer at the other side from the paper tray and toner cartridge door. You should see a little black roller rod along with some white wheels.
The noise may be coming from the contact between the wheels/rollers which pull paper toward the output tray on top after it has been printed.
Check and clean/wipe the wheels and black rod, especially in the center area. Hopefully the noise will now be reduced/eliminated.
Sounds like you lost the High Voltage. The beating sound is the power supply trying to start up. After a predetermined time it will quit to protect the set. This is a very common problem and typically not that much to repair. If you are not an electronics repair technician you should find a reputable repair shop and enlist their services. I would not think the cost should exceed $150.00 to repair. Good luck.