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Hi, the left hinge is spring loaded to keep the lid open. This applies a lot of pressure on the pivot point of the hinge (steel pin/plastic hinge) that elongates the plastic holes and raises the lid from the scanner. As the paper leaves the scan window, a ramp next to the scan window sends the paper up to the tray, just past that ramp under the lid is a lip that guides the paper to the tray. With the hinge stretched, the lip is too high and catches the end of the paper at the rear only, and jams the paper. If you press on the cover (with the new hinge) and it does not catch then you have installed a bad hinge. Also ensure that the top part of the hinge is on the guide pins under the cover.
Lift the lid and to the left of the main glass is a smaller glass; that is what scans during the feeding process. Make sure that it is completely clean; even a speck of dust can cause a line to appear. I took a lens wipe and cleaned mine and my line was gone.
You can try to get a hinge @ a local authorized brother dealer. I just got mine for 20 bucks, I think that the guy ripped me off, but I needed. Once you get it, it is very easy to replace. 1St, replace the old one by removing the screw in the back of the hinge (back of printer). then pretend that you are lifting the whole automatic feeder up. At this point you will see the right hinge looks likeit it coming out. Don't pull it out completely. Just pull it enough that you can flip the feeder enought so you can uncrew the 3 screw attached to the feeder. Once you remove the broken part, install the new hinge. make sure that you screw hinge first before you slip it down to the bottom hole then screw the hinge to prevent it from moving.
PS: try not to flip the feeder too far back
i went to Brother site and opened support.
searched for parts and got a listing of technical support shops in my area. called the first one listed and asked if they had the LP2403001 hinge in stock and they came back with an affirmative answer. will pick it up this afternoon locally.
You can see an image of the hinge assembly at ebay if you search for LP2403001.
Yes there is and I know your problem have a look at the left hinge on lid that you lift to put down an original for copying, it will be breaking apart, the switch is black in that same corner on doc feeder base, as the hinge breaks apart the doc feed lifts in that corner causing "doc cover open" cause that switch no longer gets pushed in when lid is shut
Dodgy repair - tape switch closed, but doc feeder will not work properly/can use glass.
Repair - Easy removal of three screws and replacing 20buck hinge bought from brother dealer...part no.LE8731001 Hinge assy left.
I had the same problem, found your site and all of your suggestions. I ordered the same left hinge assembly from Vance Baldwin Electronics Part #LP2403001 for $11.03, shipping from FL to OK was $9.23 UPS, so less than $20 and my MFC-8440 is working again! I did have difficulty placing the screws without a second pair of hands so have someone help you hold the lid. Make sure you removed the set ***** from at least the back of the left hinge assembly so that you can remove the "case" that holds the springs and sticky white parts. (Yes, I am a girl) :-). My husband will be so suprised when he gets home and sees that it works now because it was on his honey do list this weekend. Also, make sure that you replace the set screws and clean the scanner appropriately before use. I really like this site, it saved me a lot of money this time. Take Care!