There are quite a few different "standards" (an oxymoron). I don't have an ASIair so I don't know what plug it uses. The most common are 5.5mm/2.5mm and 5.5mm/2.1mm. To make it worse, they are not consistent. These are supposed to be one of each. The 2.1 is showing as 2.2. Using a larger plug will cause exactly what you are seeing.
They are not consistent.
I tried the 5.5mm cable that serves as my Argo Navis back-up. Did not work on my AAP unless wiggled. (Initially I though my AAP was dead on arrival!)
Trying several others, I did find one that makes a reliable physical connection and made up a power cable with a car plug and fuse protection.
A great source for these is your local Goodwill, Habitat for Humanity, or Thrift stores. You can get a fistful of electrical cables with 5.5mm ends for maybe $10. Don't worry about the other end of cable, it can be snipped off and discarded. Test them all until you get a winner, then make it into a power cable.
Edited by Jeff Morgan, 02 August 2021 - 10:07 AM.