OK - A little OT but here goes -

As I mentioned above, I have a Brother AIO (DCP-2540DW), and I also picked up another Brother, MFC-7440N (I don't use the fax function on the '7440).

I really use the scan and copy functions, especially since both have an Automatic Document Feeder (ADF).

Testing: When copying either from the glass or the ADF, both units perform flawlessly.
When scanning from the glass, both units perform perfectly.
However, when scanning from the ADF, both units show a black streak down the middle.

Since the same ADF is used for copying and scanning, I guess I'm assuming that, after the scan electronics, the output is directed either to the copy electronics or the scan electronics. I think that if I want to go through the trouble of disassembling it, I might find a bad/loose cable connector somewhere in there.

Anyone know if this is a common problem with Brothers and/or with ADFs in general?

PS - I also picked up a Fujitsu ScanSnap which I use on the job (it's quite small) and scans perfectly - uses their ADF for everything. So, I'm OK with volume scanning, but I'd sure like to get the Brothers fixed if possible, without having to ship it/pay an arm and a leg, etc.