[Strange sound if pressed the Fire button]

All of them James. In wattage mode, in the TC mode... does not matter which one I use. It´s still the same sound.

[Strange sound if pressed the Fire button]

I was searching for few hours and foun nothing. I hope that somebody will tell us what´s wrong (if is).

[Strange sound if pressed the Fire button]

@conradisrugged  Not just the click, but the sound of some kind of short circuit... strange

@Ads1969  Same for me, they work without any problems. But the sound is strange. Few of my friends does have 75C and no sounds after pressing the button. 

[Strange sound if pressed the Fire button]

Hello ladies and gentlemen, I have encountered an issue with my DNA75C Therion and with my 75C home made box. I am not able to describe the sound so I am attaching link to my YT channel and directly to video. Of course there is common sound of working atty BUT if you will listen carefully you will hear such a kind of "sparkles" or sound of short ... Strange is that this exact sound can be heared on two different devices. Wooden boxmod (everything soldered pretty carefully and well, no shorts anywhere) which I made, and Lost vape Therion. It is not kind of an issue which is limiting the usage of the boxes, no faster battery drain, no wrong measured coils or anything...just that sound after I push the Fire button--- Anybody some ideas, thaughts or fixes?

Thank you for your help, answers and your time.