[Sparks across 510 connection]

As I posted earlier my faulty board reads 4.5v across the 510 permanently.

[Sparks across 510 connection]

Potentially that could be the case, all the boards have been charged using the same 2A wall wart at some point or other.

The first blew initially in normal use waking from off.
It then fried the board when used whilst charging.
The second again in normal use waking from off.
Fuse replaced started sparking across the 510.
The efusion blew waking from off, not changing that fuse its off for RMA as we speak.

From two working DNA 200s to none in a few days

Awesome!

Back to the old faithful Sigelei 100w no fuses, no stress, just no TC or USB charging.

[Sparks across 510 connection]

Further to this my Lost Vape Efusion has now blown its fuse.......

What is going on!

0.1 ohm TI dual coils in Billow V2.  Solid connection working perfectly then blows out of the blue!!!!

Issues!

[Sparks across 510 connection]

Just stripped the mod down to RMA to Rob at stealthvape UK(awesome customer service) the pd across the 510 is 4.5v permanently. I haven't checked if the battery drains as it feels like a ticking bomb waiting to give up spectacularly.

[Sparks across 510 connection]

I have since tested it in non-temp control mode, the sparking still occurs.

[Sparks across 510 connection]

[video]https://youtu.be/666xjdQjjng[/video]

This video demonstrates the sparks that are produced across the 510 connection.  Here is a photo of the internal 510 connections. 

[Sparks across 510 connection]

I did initially think this could be the case but my other DNA 200 has no sparks at any time.

[Sparks across 510 connection]

I should have said it has been working fine since the fuse replacement, I just will not be using it until I get to the bottom of the sparking situation.  It seems to be constantly putting a voltage to the 510 even when the board is sleeping.

[Sparks across 510 connection]

Earlier today my replacement DNA 200 board blew its fuse.  No obvious reason it has been operating as expected for about 1 month after the previous board quit.

Since replacing the fuse I have been getting sparks across the 510 connector, I noticed this originally when I was testing the spring return center pin.

My question is has the fuse blowing incident caused another issue ion the board?  My lost vape efusion doesn't behave like this so I guess its RMA number 2.

FYI it is a 3d printed enclosure and all solder joints have been checked reflowed and heat shrink wrapped after my last RMA experience.

[Mod just stopped working]

I also had a fuse blow over the weekend, I am in the UK hence I ordered some fuses to replace myself.  Replaced fuse today and after about an hours vaping on a 0.1 TI dual coil build the device is now non-responsive (fuse intact).  No connection to Escribe and no firmware update available due to no connection.  I have established an RMA with my UK vendor.

The mod is 3d printed and the solder connections were solid and there are no shorts at all. The board did feel quite hot when it was connected to the PC after the "event".  Prior to the event there was a loss of power to the atty followed by a hot hit then the board gave up.

There are no obvious marks or damage on the board that I can see.  Hope this helps solve the issue.