Sorry i cant help you with this one but my best advice to you is not to use it till you get it sorted hopefully another ape will be able to help you soon sorry again......
Thank y'all, yeah I'm using my old snowwolf 75w, hopefully I can fix it, everything looks like it's fine, til I screw in my tank, acts like the firing button is stuck but it doesn't feel like it is, but maybe somebody will know something thank you very much for responding
Stating the obvious your fire button is jamming in by the sounds, does it feel stuck in?
Also can you tell us what it says without a tank on? is it saying 'no atomiser' or similar?
Is it still in warranty? if not and you feel confident with stripping electronics I would strip it down and check to contact and fire button from inside.
Either that of the age old fix it method of 'If in doubt - give it a clout' against something that won't damage your mod, try tapping the fire button side against something and see if it frees it up.
I suspect something's got inside the fire button causing it to stick, and my last resort would be squirting a tiny amount of GT85 and keep pressing the fire button (with batteries out).
That's all I can suggest without actually examining the mod.