I had this problem on my Advent AW10 and it's not caused by a paper jam. The printer fails the start up tests and is caused by the printer head cleaning station being gummed up with old ink. You need to disassemble the printer in order to completely remove it however you can remove the white tray by carefully prying it out. Clean it thoroughly in hot soapy water and clean inside of the printer and gears clear of ink much as you can. If you completely remove the cleaning station you'll find out where all your ink goes!