First time question. Have had printer (used) running alright for about 3 mos. Suddenly get "paper jam" mess. Followed HP's checks - no paper anywhere, rollers cleaned, metal springs in place, and position flex strip cleaned. Still reads jam. Is there another sensor (optical?) that's become dirty? TIA Glenn The NOSPIN Group is now offering Free PC Tech support at our newest website: http://freepctech.com