It sounds like you might've tried this, but make sure to unplug the power adapter from both the Wii and the wall socket. Wait 10 minutes. Plug it back in.
So yesterday I was playing with some of my friends and and switched off. Wouldn't power on at all.
For the past 1-2 months, after I play for, like, an hour or so the Wii would suddenly switch off and wouldn't power on for 10-15 minutes. I did not think it was a major issue and thought it was due to overheating. I would then switch it on only after it was cooled down.
This happened yesterday too. I heard a small "pop" sound from the power adapter. Wii wouldn't switch on at all. Tried a new adapter. Didn't work.
I just want to know if this is repairable or not. If so, what should I check for if I open the Wii? Should I give it to my local game service shop?
I don't want it to die. Such a precious and awesome console with so many awesome games.
So you plug it in and electrically it's dead? Or black screen? Or? What System Menu and region? Do you have a NAND backup? Is this Wii an IOS install of BootMii, or a boot2 unit? Just asking general questions so that it's covered by the time mauifrog (brick fixer) comes along...
Electrically dead (nothing seems to turn on, the exact definition of a brick).
I don't think this matters, but still,
4.3U, BootMii as IOS (can't install as boot2), I do have a NAND backup. Don't know what I can do to restore it though.
I'm no expert on this, but the way you described it, sounds like the internal power supply fried.
If you plug it in and the power light isn't lit red, get the mortar.
You may be able to frankenstein in a power supply from another broken unit and see if you can get it to work, if you trust yourself with that sort of thing (I wouldn't trust myself with it .. I tried hard modding a gamecube and I fried the board. Then I tried making one working DS Lite out of two broken units. I just ended up with one huge pile of spare parts.)
There still has to be something inside the box to feed power into the motherboard and other systems. Think of a PC. It contains a power supply inside that powers everything else.
I imagine there is a small version of that in the Wii. You're not directly tapping into the motherboard.