Good to meet you again even under unfortunate circumstances, Taro san.
I really don't know what to think, if a 12V supply does not make the EAF appear; especially if the problem suddenly cropped up by itself. It is a real head scratcher that the EAF continues to work with desktop computers, but not with a Raspberry Pi microcomputer.
There is one thing that the Raspberry Pi does not like, and that is backpowering of the USB ports (that is why many powered USB hubs do not work with ASIAIR). If you have a spare UNpowered USB hub, try placing one in between the EAF and the ASIAIR. But it is a long shot that the EAF would suddenly decide to backpower the Raspberry Pi.
Otherwise, I hope all else is fine in the land of the smiles :-)
Chen