So I picked up rx the other woth the Same issues.
Won't even switch on without the usb cable.
All wires were soldered correctly
After I took the rx apart
Found nothing wrong
Not even solder on the board if it was creating a Dead short connection with another resistor or wateva.
Next move was to contact
Mr Vape Cartel
He can help get ot sorted maybe.
Other
I've got another plan in mind for the Paperweight 3 battery mod
Super confused, just to understand - the mod with batteries, does not turn on - but it does if you plug in a USB cable? What happens with other batteries?