I sent you a forward pm but see that I maybe should have sent it here. I have a two month old dynasty 350. I just checked and have 18 hours and 18 minutes and 2400 start arcs. I am new to tig but for the last two weeks have had trouble starting the arc. I did have the start time set too low as per one of the recommendations from this site. I set everything to factory. Seemed ok for about 4-5 starts then back to the same thing. I can hear the unit busing or sounding like it is arcing when I try to start but nothing happening at the torch. A few times I did see the arc at the torch but still no start. Have messed with the ground, reground the tungsten, etc but it still seems the same. Any suggestions?