Hello, I’m Nathan, and I’ll be assisting you today. My livelihood depends on your positive feedback, so your satisfaction is my highest priority.
Sorry to hear you’re having trouble.
This will be the result of contamination in the ADF or a hardware fault in the feed mechanism. Lift the lid over the adf and check carefully with a flashlight for any scraps of paper, stray staples or paperclips, etc. Clean all exposed rubber wheels/rollers with qtips and rubbing alcohol. Blow it out with compressed air, then close it back up.
Lift the lid over the glass, then clean the underside of the lid on the far left side carefully, focusing on the thin plastic strip there (which is what guides the scanned page into the output tray), which is where the most dust tends to accumulate .
Then reset the machine:
unplug power at the wall outlet
wait 5 minutes
press and hold the power/on button for 60+ seconds
keep holding while plugging back in, and for another 60 seconds after, then release
Let me know the results, and I’ll advise further if needed.