Wii powers off randomly

I have a Wii that powers off quite frequently.

When it does, the light on the power button no longer lights up unless I unplug and plug the power cord back in.

It never did this before.

Any ideas?

Also, the same power supply works fine on other Wii's, so I don't think it's the power supply.

Off topic, I never receive emails about the threads I have set to receive emails about replies, why not?

the email thing doesn't work, and never has for some reason. even email password reminders dont work.

but on topic, i'm afraid i have no idea. but it sounds like a hardware fault.