DELL 1320c printer not working, yellow light on power icon

Recently i have beentrying to print corsework and my printer will not print ive look at the cables and wiring and connection, ive looked at the ink, it prints out the test papers fine just not my papers on my pc what the hell am i supposed to do, ive tried everything that my brain can handle, im not in I.T so im not bright with pcs so could you please give me a simple comment, no offence :P Thank you x