Well imo you need to try that, they may not have found a problem if it only happens on rare occasions, is be getting a replacement for peace of mind
I have a replacement coming. Unfortunately though, I will never get peace of mind, because I will be always panicing about it (and other things) shutting down now because it has sent my mind into a frenzy, catastrophising the whole issue. It's why I joined here, in a desperate attempt, to try and rule out the electric side of it.
I can't game with the 'uncertainty' of the issue happening. My OCD and aspergers and mental health issues make that extremely hard for me in particular.
That's why I am desperate to find a 100% answer on the cause of the issue. So I can either try to fix it, or work around it. But I can't find the cause
It's all just eliminating possibilities, but these possibilities aren't getting truly eliminated, because there's no way to truly tell.
The issue happened on 2 different wii us, and I also tried 2 different extension cables and 2 different plug sockets (same wall outlet though). All the same issue.
The only possibilities are these:
1 - Something wrong with my electrics or that particular wall outlet.
2 - Something wrong with wii u's in general, but if this was the case, why the hell is nobody else on the entire internet reporting the same problem as me? I also have my wii u in an appropriate place, no dust, and it doesn't even overheat when it switches off either, it's not even warm.
3 - The AC adapter. (But according to Nintendo's jargon, it didn't seem to have a fault - if it was even looked at!)
4 - Nothing wrong with my electrics, however, my electrics just don't mix well with wii u's in particular (is this even possible?)