This is kind of odd...
I picked up an SNES mini this week at Goodwill for 25 bucks. That included all cords and two controllers. I get home and it doesn't turn on. I switch out the power supply with my regular SNES and nothing. Now I try both of the adapters on my regular SNES and nothing happens. Now I'm a little worried, because my SNES has held up for a very long time and I'm afraid it may be broken (I hadn't used it for a month or so).
I try the power supply that I know has worked for a long time on several outlets and all the sudden it powers on my regular SNES. I take that adapter and immediately try it on the SNES mini and now that works.
The next day I grab my regular SNES and bring it into another room to play. I take the adapter off the mini and put it on my old SNES when I am in the other room. Same thing, no power. I try it on various outlets until it works.
Now that it's working again, I plug it back into the mini and decide to just leave it there. It seems to be working if I don't move it around.
I guess I'll just buy another adapter, but does anyone know why this might be happening?