First, double-check to make sure the coil head or the mini-RBA is nice and snug. Try disconnecting the coil head or mini-RBA a few times just to be sure. When tanks like this are new, the threads tend to be a bit tight.

If that doesn’t solve the problem, you probably need to adjust the center post in the airflow collar. This is a floating post and if it doesn’t make contact with the bottom of the OCC coils or the mini-RBA, the mod doesn’t think that you have an atomizer connected.

Open the tank as if you’re going to change the coils.
Remove the coil head or RBA that you have in place.
Look down at the airflow base. See that copper pin in the middle? That’s the troublemaker.
Flip the airflow base over.
Push on the copper pin to seat it more deeply into the base. This takes a good amount of pressure. You may need to cup the base in your hand and push it against a desk or other hard piece of furniture.

I still have the OG IPV Mini when it first came out.

Try cleaning the 510 connection first but then again the Mini 2 is known for having shoddy shouldering. Worse case scenario, it's dead, Jim.
Serpent mini, single coil, great flavour but 2mls capacity. Maybe Tobecco Super Tank afterthat but generally, any single coil tank is low maintainence like the Uwell Crown v1

Before u consider swapping the 510:

1) Compare the soldering with the pictures in https://learn.adafruit.com/adafruit-guide-e...common-problems
Cold joints can cause problems similar to yours, and can be remedied by reflowing the solder.

2) Get/borrow a multimeter and do a continuity test.
http://en-us.fluke.com/training/training-l...multimeter.html

Hi guys. I'm flying to Cambodia tomorrow so how should I bring my vape stuffs. No luggage, just hand carry. Should I disassemble everything?

Have you tried it? If not no one could help you!!

Sometimes, your mod is sensitive and some is okay. So, longer positive pin would works.

New device or what? Just send them back to the seller.