Hi, thank you for contacting JustAnswer.com. My name is Russell. I will do my best to provide the right answer to your question.
Please clarify the circumstances of your question: Is 'the paper source is invalid' or some similar message, seen on the printer's screen? or something like it, on the computer's screen?
Can the machine not do a photocopy, by itself?
What sort of computer are you printing from?
What size of original and/or of printout are you trying to print out (or photocopy) ?
Let me know, and I will advise you. Thanks.
I am glad to hear that the problem was solved, by whatever means.
Thank you for bringing your question here to JustAnswer.com.