Its getting old........but I still think there's hope for it. It fires intermittently. Getting frustrated with it, so I cleaned it and oiled it. Got new fuel cell in it. Shoots 3 nails then nothing, etc. When I push the nose down I can hear the electronics running inside and smell the gas. When I pull the trigger without pushing the nose down the fan runs. Seems like everything is functioning electronically, but still only intermittent firing.. I have it apart again and noticed a little black button that makes contact with cylinder when the nose is depressed(I think its called the head switch). Could this b the culprit? Not sure how much its going to cost to get it professionally serviced or if its worth it the age it is. Any ideas?