I have a DNA200 that I built. Been using it for around 8 weeks now. I run it at around 25W, with temp builds, almost exclusively. I have the board configured for the case, battery and internal resistance. Running a 12oo mAh Kinexsis Lipo. I was vaping on it at work. Took a drag, exhaled. Took another drag, nothing happened. Looked at the screen...its blank. Plugged it into Escrib...would not connect. I am using the same USB cable that I configure all my mods with. Opened up the mod and checked the Lipo pack with a DMM, reading 11.55V. Checked the fuse with a DMM and it is good. For S&Gs, I checke my grounds and checked for shorts, all with a DMM. This board literally just stopped working. The only thing I have done to the board recently was add the Ti profile for Sweet Spot Ti 0.4mm wire. I did that 3 days before the board died.