Possible Fix: Deeply clean the front scanner, then recalibrate.  Worked for me so far. I took the front scanner out. 6 screws at the top of the front lid, pry off lid from left/right.   Once open,  remove the white flat-flex on the right (pull). The scanner head is held in with clips on left and right, a screwdriver to push them in.   Careful of the 2 springs beneath the scanner head.  Once the head was removed I used a alcohol wipe to clean the lens and really well under the odd plastic cover. (it doesn't come off).
My belief,  that a smudge or some dirt keeps the  band from properly calibrating. (mine is in the center).
To reassemble, I gently popped the scanner head back in, replaced white flat flex, and snapped cover on, and put in screws.
First test scan still showed band.  Performed calibration with a thick piece of white paper.  Scan looks perfect.
Note: before this, running a calibration could make the band less noticeable but it was still visible. Now the band is gone.
       
      
               
                     
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crwdns2944067:03crwdne2944067:0
Did anyone ever find a solution for this?
crwdns2934271:0crwdnd2934271:0 Peter Miles crwdne2934271:0
I have the same problem; gray band, 1/3 page, left side
crwdns2934271:0crwdnd2934271:0 Scott Smith crwdne2934271:0
Same problem here, it appears that on the side that lifts up from the scanner, there is a plastic strip that has been scuffed on my unit. I've looked only but cannot find that plastic piece to simply replace it.
crwdns2934271:0crwdnd2934271:0 Harold Diaz crwdne2934271:0