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Depending upon the age of the printer, and how much use it has been / how many pages it has printed, it might perhaps be owing to dirty rollers in the back part of the machine.
You could try cleaning the rollers.
Remove all paper from the machine, unplug it, and open it so as to have access to the rollers in the problem area where feeding is not being done properly.
Take a clean high-quality lint-free rag cloth, moisten it with rubbing alcohol, and rub the rollers firmly all over their paper-contacting surfaces, three times over.
(If the rollers are hard to reach, there is another way to clean them... let me know if that is the case, and I will detail how to do the cleaning.)
Allow 5+ minutes for drying-off, then reload the paper, close up the machine where you opened it up, and then try again.
Let me know how this goes, I will advise you further as needed.
Very well... I hope that the new printer serves you well, Graham.
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