After almost 4 years of owning my Dwarf, the DC connector started to fail. Power would go in and out if I slightly moved the power cable behind the Dwarf.
It turns out the issue was a “Cold Solder”. I simply re-applied some solders on the 3 prongs of the DC connector on the PC board and Voilà, good as new!
If you encounter this problem, there may be no need to ship out for repairs as long as you have either soldering skills or know someone who does.